Class 5 Maths Chapter 12 Solutions: Racing Seconds

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Read the prompt, attempt it, then check each step

Every exercise subpart and table row is a separate item. Shared figures and table headings are repeated whenever they are needed to understand the question.

Detailed worked answers

Textbook page 155

Textbook page 155 · solved item 1

NCERT Class 5 Maths Chapter 12, solved question 1 — Question from the current NCERT textbook

At what time did Raghav start practising yoga?

Show detailed solution

Step 1: Look at the clock beside Raghav standing on the mat.
Step 2: The long minute hand points to 7, which means 35 minutes.
Step 3: The short hour hand is between 5 and 6, so the hour is still 5.
Answer: Raghav started at 5{:}35 a.m.

Textbook page 155 · solved item 2

NCERT Class 5 Maths Chapter 12, solved question 2 — Question from the current NCERT textbook

At what time did Raghav finish practising yoga?

Show detailed solution

Step 1: Look at the clock beside Raghav sitting on the mat.
Step 2: The long minute hand points to 11, which means 55 minutes.
Step 3: The short hour hand is almost at 6, so the hour is still 5.
Answer: Raghav finished at 5{:}55 a.m.

Textbook page 155 · solved item 3

NCERT Class 5 Maths Chapter 12, solved question 3 — Question from the current NCERT textbook

How much time did Raghav spend practising yoga?

Show detailed solution

Step 1: He started at 5{:}35 a.m. and finished at 5{:}55 a.m.
Step 2: Both times are within the same hour, so count forward from minute 35 to minute 55.
Step 3: 55 - 35 = 20 minutes.
Answer: Raghav practised yoga for 20 minutes.

Textbook page 155 · solved item 4

NCERT Class 5 Maths Chapter 12, solved question 4 — Question from the current NCERT textbook

Find the time elapsed from 01:15 p.m. to 01:42 p.m.

Show detailed solution

Step 1: Count from 01{:}15 p.m. to 01{:}40 p.m.: 25 minutes.
Step 2: Then count from 01{:}40 p.m. to 01{:}42 p.m.: 2 minutes.
Step 3: 25 + 2 = 27 minutes.
Answer: The elapsed time is 27 minutes.

Textbook page 155 · solved item 5

NCERT Class 5 Maths Chapter 12, solved question 5 — Question from the current NCERT textbook

Find the time elapsed from 03:18 p.m. to 08:18 p.m.

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Step 1: The minute part is 18 at both the start and the finish.
Step 2: Count the hour jumps: 3{:}18 to 4{:}18, then on to 8{:}18.
Step 3: There are 5 one-hour jumps.
Answer: The elapsed time is 5 hours.

Textbook page 155 · solved item 6

NCERT Class 5 Maths Chapter 12, solved question 6 — Question from the current NCERT textbook

Find the time elapsed from 09:15 a.m. to 11:30 a.m.

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Step 1: From 09{:}15 a.m. to 11{:}15 a.m. is 2 hours.
Step 2: From 11{:}15 a.m. to 11{:}30 a.m. is 15 minutes.
Step 3: Put the two parts together: 2 hours and 15 minutes.
Answer: The elapsed time is 2 hours 15 minutes.

Textbook page 155 · solved item 7

NCERT Class 5 Maths Chapter 12, solved question 7 — Question from the current NCERT textbook

Who took the longest time to paint a picture?

Show detailed solution

Step 1: Read the three times: Raghav took 1 hour 20 minutes, Rani took 2 hours 10 minutes, and Ritu took 1 hour 35 minutes.
Step 2: Rani is the only child whose time is more than 2 hours.
Step 3: Therefore her time is greater than both of the other times.
Answer: Rani took the longest time.

Textbook page 155 · solved item 8

NCERT Class 5 Maths Chapter 12, solved question 8 — Question from the current NCERT textbook

Who took the least time to paint a picture?

Show detailed solution

Step 1: Rani's 2 hours 10 minutes is not the least.
Step 2: Compare the two times beginning with 1 hour: 20 minutes is less than 35 minutes.
Step 3: So 1 hour 20 minutes is the smallest time.
Answer: Raghav took the least time.

Detailed worked answers

Textbook page 156

Textbook page 156 · solved item 9

NCERT Class 5 Maths Chapter 12, solved question 9 — Question from the current NCERT textbook

Write 08:35 hours in the 12-hour format.

Show detailed solution

Step 1: The hour is 08, which is before 12 noon.
Step 2: Morning times use a.m.
Step 3: Check whether the result has two hour digits and two minute digits.
Answer: 08{:}35 hours becomes 08{:}35 a.m.

Textbook page 156 · solved item 10

NCERT Class 5 Maths Chapter 12, solved question 10 — Question from the current NCERT textbook

Write 11:55 a.m. in the 24-hour format.

Show detailed solution

Step 1: An a.m. time before noon keeps the same hour number.
Step 2: Keep the minutes as 55.
Step 3: Check whether the result has two hour digits and two minute digits.
Answer: 11{:}55 a.m. becomes 11{:}55 hours.

Textbook page 156 · solved item 11

NCERT Class 5 Maths Chapter 12, solved question 11 — Question from the current NCERT textbook

Write 05:30 p.m. in the 24-hour format.

Show detailed solution

Step 1: For a p.m. time after noon, add 12 to the hour.
Step 2: 5 + 12 = 17, and the minutes stay 30.
Step 3: Check whether the result has two hour digits and two minute digits.
Answer: 05{:}30 p.m. becomes 17{:}30 hours.

Textbook page 156 · solved item 12

NCERT Class 5 Maths Chapter 12, solved question 12 — Question from the current NCERT textbook

Write 09:35 p.m. in the 24-hour format.

Show detailed solution

Step 1: For a p.m. time after noon, add 12 to the hour.
Step 2: 9 + 12 = 21, and the minutes stay 35.
Step 3: Check whether the result has two hour digits and two minute digits.
Answer: 09{:}35 p.m. becomes 21{:}35 hours.

Textbook page 156 · solved item 13

NCERT Class 5 Maths Chapter 12, solved question 13 — Question from the current NCERT textbook

Match 06:30 a.m. with its 24-hour time.

Show detailed solution

Step 1: It is a morning time, so the hour stays 06.
Step 2: The minutes stay 30.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 06{:}30 hours.

Textbook page 156 · solved item 14

NCERT Class 5 Maths Chapter 12, solved question 14 — Question from the current NCERT textbook

Match 08:45 p.m. with its 24-hour time.

Show detailed solution

Step 1: Add 12 to the hour for a p.m. time: 8 + 12 = 20.
Step 2: The minutes stay 45.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 20{:}45 hours.

Textbook page 156 · solved item 15

NCERT Class 5 Maths Chapter 12, solved question 15 — Question from the current NCERT textbook

Match 11:45 p.m. with its 24-hour time.

Show detailed solution

Step 1: Add 12 to the hour: 11 + 12 = 23.
Step 2: The minutes stay 45.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 23{:}45 hours.

Textbook page 156 · solved item 16

NCERT Class 5 Maths Chapter 12, solved question 16 — Question from the current NCERT textbook

Match 04:30 a.m. with its 24-hour time.

Show detailed solution

Step 1: It is before noon, so the hour stays 04.
Step 2: The minutes stay 30.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 04{:}30 hours.

Textbook page 156 · solved item 17

NCERT Class 5 Maths Chapter 12, solved question 17 — Question from the current NCERT textbook

Match 07:30 p.m. with its 24-hour time.

Show detailed solution

Step 1: Add 12 to the hour: 7 + 12 = 19.
Step 2: The minutes stay 30.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 19{:}30 hours.

Textbook page 156 · solved item 18

NCERT Class 5 Maths Chapter 12, solved question 18 — Question from the current NCERT textbook

Match 01:30 a.m. with its 24-hour time.

Show detailed solution

Step 1: It is a morning time, so the hour stays 01.
Step 2: The minutes stay 30.
Step 3: Find that exact time in the right-hand column.
Answer: Match it with 01{:}30 hours.

Detailed worked answers

Textbook page 157

Textbook page 157 · solved item 19

NCERT Class 5 Maths Chapter 12, solved question 19 — Question from the current NCERT textbook

How much more than 1 minute did the first-place child take?

Show detailed solution

Step 1: Read the podium timer: it shows 01{:}55.
Step 2: The first two digits show 1 complete minute.
Step 3: The last two digits show the extra 55 seconds.
Answer: The child took 1 minute and 55 seconds, so the part beyond one minute is 55 seconds.

Textbook page 157 · solved item 20

NCERT Class 5 Maths Chapter 12, solved question 20 — Question from the current NCERT textbook

How much more than 1 minute did the second-place child take?

Show detailed solution

Step 1: Read the podium timer: it shows 01{:}56.
Step 2: The first two digits show 1 complete minute.
Step 3: The last two digits show the extra 56 seconds.
Answer: The child took 1 minute and 56 seconds, so the part beyond one minute is 56 seconds.

Textbook page 157 · solved item 21

NCERT Class 5 Maths Chapter 12, solved question 21 — Question from the current NCERT textbook

How much more than 1 minute did the third-place child take?

Show detailed solution

Step 1: Read the podium timer: it shows 01{:}57.
Step 2: The first two digits show 1 complete minute.
Step 3: The last two digits show the extra 57 seconds.
Answer: The child took 1 minute and 57 seconds, so the part beyond one minute is 57 seconds.

Textbook page 157 · solved item 22

NCERT Class 5 Maths Chapter 12, solved question 22 — Question from the current NCERT textbook

Identify the child who won the race. How much time did the child take?

Show detailed solution

Step 1: The winner is the child standing on the first-place platform.
Step 2: It is the child shown in the red shirt; the picture identifies the winner by position rather than by a printed name label.
Step 3: Her timer reads 01{:}55, meaning 1 minute 55 seconds.
Answer: The red-shirted child on the first-place stand won in 1 minute 55 seconds.

Textbook page 157 · solved item 23

NCERT Class 5 Maths Chapter 12, solved question 23 — Question from the current NCERT textbook

Should blinking your eyes be measured in seconds or minutes?

Show detailed solution

Step 1: A blink begins and ends almost immediately.
Step 2: It takes much less than one minute.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 24

NCERT Class 5 Maths Chapter 12, solved question 24 — Question from the current NCERT textbook

Should switching the lights on and off be measured in seconds or minutes?

Show detailed solution

Step 1: Pressing a switch is a quick action.
Step 2: It normally takes only a few moments.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 25

NCERT Class 5 Maths Chapter 12, solved question 25 — Question from the current NCERT textbook

Should counting from 1 to 20 be measured in seconds or minutes?

Show detailed solution

Step 1: Say the numbers at a normal speed.
Step 2: The count usually finishes before one minute passes.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 26

NCERT Class 5 Maths Chapter 12, solved question 26 — Question from the current NCERT textbook

Should filling a glass from a tap be measured in seconds or minutes?

Show detailed solution

Step 1: A normal tap can fill one glass quite quickly.
Step 2: The action normally finishes in less than a minute.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 27

NCERT Class 5 Maths Chapter 12, solved question 27 — Question from the current NCERT textbook

Should melting an ice cube be measured in seconds or minutes?

Show detailed solution

Step 1: An ice cube changes slowly at room temperature.
Step 2: Many groups of 60 seconds pass before it melts.
Step 3: Tick the minutes column.
Answer: Measure it in minutes.

Textbook page 157 · solved item 28

NCERT Class 5 Maths Chapter 12, solved question 28 — Question from the current NCERT textbook

Should making a phone call be measured in seconds or minutes?

Show detailed solution

Step 1: A conversation usually lasts longer than a few seconds.
Step 2: It is more useful to count complete minutes.
Step 3: Tick the minutes column.
Answer: Measure it in minutes.

Textbook page 157 · solved item 29

NCERT Class 5 Maths Chapter 12, solved question 29 — Question from the current NCERT textbook

Should sitting down on the floor be measured in seconds or minutes?

Show detailed solution

Step 1: The movement from standing to sitting is quick.
Step 2: It normally takes only a few seconds.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 30

NCERT Class 5 Maths Chapter 12, solved question 30 — Question from the current NCERT textbook

Should drinking a glass of water be measured in seconds or minutes?

Show detailed solution

Step 1: Drinking one glass usually takes less than one minute.
Step 2: Count the short duration in seconds.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 31

NCERT Class 5 Maths Chapter 12, solved question 31 — Question from the current NCERT textbook

Should snapping your fingers be measured in seconds or minutes?

Show detailed solution

Step 1: One finger snap happens almost at once.
Step 2: It takes only a fraction of one minute.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Textbook page 157 · solved item 32

NCERT Class 5 Maths Chapter 12, solved question 32 — Question from the current NCERT textbook

Should washing your hands be measured in seconds or minutes?

Show detailed solution

Step 1: A careful hand wash can be completed in less than one minute.
Step 2: Its short duration is conveniently counted in seconds.
Step 3: Tick the seconds column.
Answer: Measure it in seconds.

Detailed worked answers

Textbook page 158

Textbook page 158 · solved item 33

NCERT Class 5 Maths Chapter 12, solved question 33 — Question from the current NCERT textbook

List other events that can happen in less than a minute or in a few seconds.

Show detailed solution

Step 1: Think of quick actions that begin and end before 60 seconds pass.
Step 2: Examples are clapping once, opening a door, tying one shoelace, turning a page, and switching on a fan.
Step 3: Check each example by timing it with a clock or stopwatch.
Answer: Any sensible list of events lasting less than a minute is correct. The five examples above can be written.

Textbook page 158 · solved item 34

NCERT Class 5 Maths Chapter 12, solved question 34 — Question from the current NCERT textbook

Estimate and verify how many balloons you can blow up in one minute.

Show detailed solution

Step 1: Make a reasonable estimate. For example, write 2 balloons in the estimated-number column.
Step 2: Start a one-minute timer and count every completed action.
Step 3: Stop exactly when 60 seconds are over and enter your count in the actual-number column.
Answer: This is a practical activity, so the actual number depends on the person. Record your measured result.

Textbook page 158 · solved item 35

NCERT Class 5 Maths Chapter 12, solved question 35 — Question from the current NCERT textbook

Estimate and verify how many push-ups you can do in one minute.

Show detailed solution

Step 1: Make a reasonable estimate. For example, write 10 push-ups in the estimated-number column.
Step 2: Start a one-minute timer and count every completed action.
Step 3: Stop exactly when 60 seconds are over and enter your count in the actual-number column.
Answer: This is a practical activity, so the actual number depends on the person. Record your measured result.

Textbook page 158 · solved item 36

NCERT Class 5 Maths Chapter 12, solved question 36 — Question from the current NCERT textbook

Estimate and verify how many breaths you take in one minute.

Show detailed solution

Step 1: Make a reasonable estimate. For example, write 18 breaths in the estimated-number column.
Step 2: Start a one-minute timer and count every completed action.
Step 3: Stop exactly when 60 seconds are over and enter your count in the actual-number column.
Answer: This is a practical activity, so the actual number depends on the person. Record your measured result.

Textbook page 158 · solved item 37

NCERT Class 5 Maths Chapter 12, solved question 37 — Question from the current NCERT textbook

Estimate and verify how many hops on one leg you can do in one minute.

Show detailed solution

Step 1: Make a reasonable estimate. For example, write 40 hops in the estimated-number column.
Step 2: Start a one-minute timer and count every completed action.
Step 3: Stop exactly when 60 seconds are over and enter your count in the actual-number column.
Answer: This is a practical activity, so the actual number depends on the person. Record your measured result.

Textbook page 158 · solved item 38

NCERT Class 5 Maths Chapter 12, solved question 38 — Question from the current NCERT textbook

Find how many times you can skip the rope in 10 seconds.

Show detailed solution

Step 1: Ask someone to start a 10-second timer.
Step 2: Skip and count only complete jumps until the timer ends.
Step 3: Repeat once if needed to check that the timing was careful.
Answer: Write the number you counted. Different learners can have different correct results.

Textbook page 158 · solved item 39

NCERT Class 5 Maths Chapter 12, solved question 39 — Question from the current NCERT textbook

Find how long it takes you to write the word FRIEND.

Show detailed solution

Step 1: Prepare a stopwatch and your pencil.
Step 2: Start the timer as you begin the letter F and stop after finishing D.
Step 3: Repeat once if needed to check that the timing was careful.
Answer: Write the measured time in seconds. Your own timed result is the answer.

Textbook page 158 · solved item 40

NCERT Class 5 Maths Chapter 12, solved question 40 — Question from the current NCERT textbook

Find how long it takes you to run 100 metres.

Show detailed solution

Step 1: Mark a distance of 100 metres and use a stopwatch.
Step 2: Start the timer when the runner begins and stop it at the finish line.
Step 3: Repeat once if needed to check that the timing was careful.
Answer: Write the measured time in seconds. The result depends on the runner.

Detailed worked answers

Textbook page 159

Textbook page 159 · solved item 41

NCERT Class 5 Maths Chapter 12, solved question 41 — Question from the current NCERT textbook

How many seconds did Rani take to get out of bed?

Show detailed solution

Step 1: The red seconds hand starts at 12.
Step 2: It finishes at 6, which is 6 jumps of 5 seconds.
Step 3: 6 \times 5 = 30 seconds.
Answer: The time taken was 30 seconds.

Textbook page 159 · solved item 42

NCERT Class 5 Maths Chapter 12, solved question 42 — Question from the current NCERT textbook

How many seconds did Raghav take to move from his room to the kitchen?

Show detailed solution

Step 1: The red seconds hand starts at 12.
Step 2: It finishes at 7, which is 7 jumps of 5 seconds.
Step 3: 7 \times 5 = 35 seconds.
Answer: The time taken was 35 seconds.

Textbook page 159 · solved item 43

NCERT Class 5 Maths Chapter 12, solved question 43 — Question from the current NCERT textbook

How many seconds did Ritu take to pick up a piece of paper?

Show detailed solution

Step 1: The red seconds hand starts at 9, the 45-second mark.
Step 2: It moves through 10, 11, and 12: three jumps of 5 seconds.
Step 3: 3 \times 5 = 15 seconds.
Answer: The time taken was 15 seconds.

Textbook page 159 · solved item 44

NCERT Class 5 Maths Chapter 12, solved question 44 — Question from the current NCERT textbook

How many seconds did Raghu take to wash his spoon and plate?

Show detailed solution

Step 1: The red seconds hand starts at 5 and finishes at 5.
Step 2: It has made one complete turn, not stayed still, while Raghu does the task.
Step 3: One complete turn of the seconds hand is 60 seconds.
Answer: Raghu took 60 seconds.

Detailed worked answers

Textbook page 160

Textbook page 160 · solved item 45

NCERT Class 5 Maths Chapter 12, solved question 45 — Question from the current NCERT textbook

Where should the missing seconds hand point after Raghu reads for 20 seconds?

Show detailed solution

Step 1: The starting seconds hand points to 12, or 0 seconds.
Step 2: Count four jumps of 5 seconds: 5, 10, 15, 20.
Step 3: The fourth jump lands on 4.
Answer: Draw the seconds hand pointing to 4.

Textbook page 160 · solved item 46

NCERT Class 5 Maths Chapter 12, solved question 46 — Question from the current NCERT textbook

Where should the missing seconds hand point after Rani colours for 30 seconds?

Show detailed solution

Step 1: The starting seconds hand points to 12.
Step 2: Thirty seconds is six jumps of 5 seconds.
Step 3: The sixth jump lands on 6.
Answer: Draw the seconds hand pointing to 6.

Textbook page 160 · solved item 47

NCERT Class 5 Maths Chapter 12, solved question 47 — Question from the current NCERT textbook

Where should the missing seconds hand point after Raghav moves for 60 seconds?

Show detailed solution

Step 1: The starting seconds hand points to 9.
Step 2: Sixty seconds makes one complete turn of the clock face.
Step 3: After a complete turn, the hand returns to its starting place.
Answer: Draw the seconds hand pointing to 9.

Textbook page 160 · solved item 48

NCERT Class 5 Maths Chapter 12, solved question 48 — Question from the current NCERT textbook

Where should the missing seconds hand point after Ritu washes for 40 seconds?

Show detailed solution

Step 1: The starting seconds hand points to 11, or 55 seconds.
Step 2: Move eight jumps of 5 seconds for the next 40 seconds.
Step 3: The hand passes 12 and the eighth jump lands on 7.
Answer: Draw the seconds hand pointing to 7.

Detailed worked answers

Textbook page 161

Textbook page 161 · solved item 49

NCERT Class 5 Maths Chapter 12, solved question 49 — Question from the current NCERT textbook

Fill the hour blank above 120 minutes.

Show detailed solution

Step 1: 60 minutes make 1 hour.
Step 2: 120 is two groups of 60.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 2 hours.

Textbook page 161 · solved item 50

NCERT Class 5 Maths Chapter 12, solved question 50 — Question from the current NCERT textbook

Fill the minute blank below 4 hours.

Show detailed solution

Step 1: Each hour has 60 minutes.
Step 2: Add 60 four times: 60 + 60 + 60 + 60 = 240.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 240 minutes.

Textbook page 161 · solved item 51

NCERT Class 5 Maths Chapter 12, solved question 51 — Question from the current NCERT textbook

Fill the minute blank below 7 hours.

Show detailed solution

Step 1: Seven hours means seven groups of 60 minutes.
Step 2: 7 \times 60 = 420.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 420 minutes.

Textbook page 161 · solved item 52

NCERT Class 5 Maths Chapter 12, solved question 52 — Question from the current NCERT textbook

Fill the hour blank above 480 minutes.

Show detailed solution

Step 1: Count groups of 60: 60, 120, 180, 240, 300, 360, 420, 480.
Step 2: There are 8 groups.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 8 hours.

Textbook page 161 · solved item 53

NCERT Class 5 Maths Chapter 12, solved question 53 — Question from the current NCERT textbook

Fill the minute blank below 9 hours.

Show detailed solution

Step 1: Nine hours means nine groups of 60 minutes.
Step 2: 9 \times 60 = 540.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 540 minutes.

Textbook page 161 · solved item 54

NCERT Class 5 Maths Chapter 12, solved question 54 — Question from the current NCERT textbook

Fill the hour blank above 660 minutes.

Show detailed solution

Step 1: Ten hours is 600 minutes.
Step 2: One more hour adds 60: 600 + 60 = 660.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 11 hours.

Textbook page 161 · solved item 55

NCERT Class 5 Maths Chapter 12, solved question 55 — Question from the current NCERT textbook

Fill the hour blank above 720 minutes.

Show detailed solution

Step 1: Eleven hours is 660 minutes.
Step 2: Add another 60 minutes: 660 + 60 = 720.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 12 hours.

Textbook page 161 · solved item 56

NCERT Class 5 Maths Chapter 12, solved question 56 — Question from the current NCERT textbook

Convert 1 hour 10 minutes into minutes.

Show detailed solution

Step 1: 1 hour is 60 minutes.
Step 2: 60 + 10 = 70.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 70 minutes.

Textbook page 161 · solved item 57

NCERT Class 5 Maths Chapter 12, solved question 57 — Question from the current NCERT textbook

Convert 2 hours 45 minutes into minutes.

Show detailed solution

Step 1: 2 hours is 2 \times 60 = 120 minutes.
Step 2: 120 + 45 = 165.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 165 minutes.

Textbook page 161 · solved item 58

NCERT Class 5 Maths Chapter 12, solved question 58 — Question from the current NCERT textbook

Convert 3 hours 15 minutes into minutes.

Show detailed solution

Step 1: 3 hours is 3 \times 60 = 180 minutes.
Step 2: 180 + 15 = 195.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 195 minutes.

Textbook page 161 · solved item 59

NCERT Class 5 Maths Chapter 12, solved question 59 — Question from the current NCERT textbook

Convert 4 hours 20 minutes into minutes.

Show detailed solution

Step 1: 4 hours is 4 \times 60 = 240 minutes.
Step 2: 240 + 20 = 260.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 260 minutes.

Textbook page 161 · solved item 60

NCERT Class 5 Maths Chapter 12, solved question 60 — Question from the current NCERT textbook

Convert 75 minutes into hours and minutes.

Show detailed solution

Step 1: 60 minutes make 1 hour.
Step 2: After taking out 60, 75 - 60 = 15 minutes remain.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 1 hour 15 minutes.

Textbook page 161 · solved item 61

NCERT Class 5 Maths Chapter 12, solved question 61 — Question from the current NCERT textbook

Convert 150 minutes into hours and minutes.

Show detailed solution

Step 1: 120 minutes make 2 hours.
Step 2: After taking out 120, 150 - 120 = 30 minutes remain.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 2 hours 30 minutes.

Textbook page 161 · solved item 62

NCERT Class 5 Maths Chapter 12, solved question 62 — Question from the current NCERT textbook

Convert 220 minutes into hours and minutes.

Show detailed solution

Step 1: 180 minutes make 3 hours.
Step 2: After taking out 180, 220 - 180 = 40 minutes remain.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 3 hours 40 minutes.

Textbook page 161 · solved item 63

NCERT Class 5 Maths Chapter 12, solved question 63 — Question from the current NCERT textbook

Convert 390 minutes into hours and minutes.

Show detailed solution

Step 1: 360 minutes make 6 hours.
Step 2: After taking out 360, 390 - 360 = 30 minutes remain.
Step 3: Check that the leftover minutes are fewer than 60.
Answer: 6 hours 30 minutes.

Detailed worked answers

Textbook page 162

Textbook page 162 · solved item 64

NCERT Class 5 Maths Chapter 12, solved question 64 — Question from the current NCERT textbook

Fill the minute blank above 120 seconds.

Show detailed solution

Step 1: 60 seconds make 1 minute.
Step 2: 120 is two groups of 60.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 2 minutes.

Textbook page 162 · solved item 65

NCERT Class 5 Maths Chapter 12, solved question 65 — Question from the current NCERT textbook

Fill the seconds blank below 5 minutes.

Show detailed solution

Step 1: Each minute has 60 seconds.
Step 2: 5 \times 60 = 300.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 300 seconds.

Textbook page 162 · solved item 66

NCERT Class 5 Maths Chapter 12, solved question 66 — Question from the current NCERT textbook

Fill the seconds blank below 10 minutes.

Show detailed solution

Step 1: Ten minutes means ten groups of 60 seconds.
Step 2: 10 \times 60 = 600.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 600 seconds.

Textbook page 162 · solved item 67

NCERT Class 5 Maths Chapter 12, solved question 67 — Question from the current NCERT textbook

Fill the seconds blank below 15 minutes.

Show detailed solution

Step 1: Fifteen minutes means fifteen groups of 60 seconds.
Step 2: 15 \times 60 = 900.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 900 seconds.

Textbook page 162 · solved item 68

NCERT Class 5 Maths Chapter 12, solved question 68 — Question from the current NCERT textbook

Fill the minute blank above 1200 seconds.

Show detailed solution

Step 1: Ten minutes is 600 seconds.
Step 2: Double both amounts: 20 minutes is 1200 seconds.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 20 minutes.

Textbook page 162 · solved item 69

NCERT Class 5 Maths Chapter 12, solved question 69 — Question from the current NCERT textbook

Fill the minute blank above 1500 seconds.

Show detailed solution

Step 1: Twenty minutes is 1200 seconds.
Step 2: Five more minutes adds 300 seconds, giving 1500 seconds.
Step 3: Place the result at the matching tick on the double number line.
Answer: Write 25 minutes.

Textbook page 162 · solved item 70

NCERT Class 5 Maths Chapter 12, solved question 70 — Question from the current NCERT textbook

Convert 320 seconds into minutes and seconds.

Show detailed solution

Step 1: 300 seconds make 5 minutes.
Step 2: 320 - 300 = 20 seconds remain.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 5 minutes 20 seconds.

Textbook page 162 · solved item 71

NCERT Class 5 Maths Chapter 12, solved question 71 — Question from the current NCERT textbook

Convert 225 seconds into minutes and seconds.

Show detailed solution

Step 1: 180 seconds make 3 minutes.
Step 2: 225 - 180 = 45 seconds remain.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 3 minutes 45 seconds.

Textbook page 162 · solved item 72

NCERT Class 5 Maths Chapter 12, solved question 72 — Question from the current NCERT textbook

Convert 700 seconds into minutes and seconds.

Show detailed solution

Step 1: 660 seconds make 11 minutes.
Step 2: 700 - 660 = 40 seconds remain.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 11 minutes 40 seconds.

Textbook page 162 · solved item 73

NCERT Class 5 Maths Chapter 12, solved question 73 — Question from the current NCERT textbook

Convert 1,000 seconds into minutes and seconds.

Show detailed solution

Step 1: 960 seconds make 16 minutes.
Step 2: 1000 - 960 = 40 seconds remain.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 16 minutes 40 seconds.

Textbook page 162 · solved item 74

NCERT Class 5 Maths Chapter 12, solved question 74 — Question from the current NCERT textbook

Convert 10 minutes 13 seconds into seconds.

Show detailed solution

Step 1: 10 minutes is 10 \times 60 = 600 seconds.
Step 2: 600 + 13 = 613.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 613 seconds.

Textbook page 162 · solved item 75

NCERT Class 5 Maths Chapter 12, solved question 75 — Question from the current NCERT textbook

Convert 4 minutes 8 seconds into seconds.

Show detailed solution

Step 1: 4 minutes is 4 \times 60 = 240 seconds.
Step 2: 240 + 8 = 248.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 248 seconds.

Textbook page 162 · solved item 76

NCERT Class 5 Maths Chapter 12, solved question 76 — Question from the current NCERT textbook

Convert 15 minutes 40 seconds into seconds.

Show detailed solution

Step 1: 15 minutes is 15 \times 60 = 900 seconds.
Step 2: 900 + 40 = 940.
Step 3: Check that any leftover seconds are fewer than 60.
Answer: 940 seconds.

Textbook page 162 · solved item 77

NCERT Class 5 Maths Chapter 12, solved question 77 — Question from the current NCERT textbook

Raghav studies four subjects for 50 minutes each. Find the total time in hours and minutes.

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Step 1: Add four equal study periods: 50 + 50 + 50 + 50 = 200 minutes.
Step 2: 180 minutes make 3 hours.
Step 3: 200 - 180 = 20 minutes remain.
Answer: The total study time is 3 hours 20 minutes.

Textbook page 162 · solved item 78

NCERT Class 5 Maths Chapter 12, solved question 78 — Question from the current NCERT textbook

Raghu left at 08:00 hours and arrived at 09:05 hours. How long did the journey take?

Show detailed solution

Step 1: From 08{:}00 to 09{:}00 is 1 hour.
Step 2: From 09{:}00 to 09{:}05 is 5 minutes.
Step 3: Put the two parts together.
Answer: The journey took 1 hour 5 minutes.

Detailed worked answers

Textbook page 163

Textbook page 163 · solved item 79

NCERT Class 5 Maths Chapter 12, solved question 79 — Question from the current NCERT textbook

Jyoti went to play at 06:15 PM and returned after 1 hour 45 minutes. When did she reach home?

Show detailed solution

Step 1: Add 1 hour to 06{:}15 PM to get 07{:}15 PM.
Step 2: Add the remaining 45 minutes.
Step 3: 07{:}15 PM plus 45 minutes is 08{:}00 PM.
Answer: 08{:}00 PM.

Textbook page 163 · solved item 80

NCERT Class 5 Maths Chapter 12, solved question 80 — Question from the current NCERT textbook

Ragini finished homework at 09:40 PM after working for 1 hour 10 minutes. When did she start?

Show detailed solution

Step 1: Count back 1 hour from 09{:}40 PM to 08{:}40 PM.
Step 2: Count back the remaining 10 minutes.
Step 3: 08{:}40 PM minus 10 minutes is 08{:}30 PM.
Answer: 08{:}30 PM.

Textbook page 163 · solved item 81

NCERT Class 5 Maths Chapter 12, solved question 81 — Question from the current NCERT textbook

Children left for a picnic at 08:30 AM and returned after 4 hours 10 minutes. When did they return?

Show detailed solution

Step 1: Add 4 hours to 08{:}30 AM to get 12{:}30 PM.
Step 2: Add the remaining 10 minutes.
Step 3: 12{:}30 PM plus 10 minutes is 12{:}40 PM.
Answer: 12{:}40 PM.

Textbook page 163 · solved item 82

NCERT Class 5 Maths Chapter 12, solved question 82 — Question from the current NCERT textbook

Raji started homework at 06:00 PM and worked for 1 hour 30 minutes. When did she finish?

Show detailed solution

Step 1: Add 1 hour to 06{:}00 PM to get 07{:}00 PM.
Step 2: Add the remaining 30 minutes.
Step 3: 07{:}00 PM plus 30 minutes is 07{:}30 PM.
Answer: 07{:}30 PM.

Textbook page 163 · solved item 83

NCERT Class 5 Maths Chapter 12, solved question 83 — Question from the current NCERT textbook

Alya went out at 05:30 PM and came back after 1 hour 10 minutes. When did she return?

Show detailed solution

Step 1: Add 1 hour to 05{:}30 PM to get 06{:}30 PM.
Step 2: Add the remaining 10 minutes.
Step 3: 06{:}30 PM plus 10 minutes is 06{:}40 PM.
Answer: 06{:}40 PM.

Textbook page 163 · solved item 84

NCERT Class 5 Maths Chapter 12, solved question 84 — Question from the current NCERT textbook

Lunch starts at 12:30 PM and lasts 35 minutes. When does lunch end?

Show detailed solution

Step 1: From 12{:}30 PM to 01{:}00 PM is 30 minutes.
Step 2: There are 5 minutes still to add.
Step 3: 01{:}00 PM plus 5 minutes is 01{:}05 PM.
Answer: 01{:}05 PM.

Textbook page 163 · solved item 85

NCERT Class 5 Maths Chapter 12, solved question 85 — Question from the current NCERT textbook

It is 08:35 PM. What time will it be after 8 hours 25 minutes?

Show detailed solution

Step 1: From 08{:}35 PM to midnight is 3 hours 25 minutes.
Step 2: After reaching midnight, 5 hours of the total time remain.
Step 3: Move 5 hours into the next morning.
Answer: 05{:}00 AM the next day.