# Time Duration

We will learn how to calculate the time duration in minutes and in hours.

We can calculate the duration of an activity if we know the starting and finishing time. For example, if the morning assembly in a school begins at 8:00 a.m. and finishes at 8:25 a.m. the duration of assembly is the difference of finishing time and starting time.

0825 - 800 = 25 minutes.

So, if we know the starting time and the duration of an activity, we can calculate finishing time of the activity.

Time Duration (in minutes)

Ron and Clara play badminton every evening. Yesterday, their game started at 5 : 15 p.m. and finished at 5 : 50 p.m. How long did their game last?

50 minutes — 15 minutes---- 35 minutes.

Rita left for Naira’s house at 7 : 30 p.m. She reached Naira’s house at 8:10 p.m. How long did it take her on the way?

7 : 30 p.m.     → 8 : 00 p.m.     → 8 : 10 p.m.

It took Rita 40 minutes to reach Naira’s house.

Time Duration (in hours and minutes)

Uma's flight took off from New Delhi at 11 : 15 in the morning (11 : 15 a.m.). When it arrived in Mumbai, her watch read 1 : 32 in the afternoon (1 : 32 p.m.). How long was the flight?

Look at the clocks.

Count the number of hours from 11 : 15 to 1 : 15. It is 2 hours.

Count by 5s and 1s to count the minutes from 1 : 15 to 1 : 32.

It is 17 minutes.

The flight was 2 hours and 17 minutes long.

Andy left his home for school at 6 : 30 a.m. He reached school after 40 minutes. At what time did he reach school?

30 minutes   +   10 minutes

Andy reached school at 7 : 10 a.m.

Duration of Time:

Duration of an activity is the difference between the starting time and finishing time. When the starting and finishing time is given, we can easily find the duration of any activity.

For examples, if Terry boarded her school bus at 7 o’clock and she reached school at 8 o’clock, the duration of her travel is 1 hour.

Solved Example on Duration of Time:

Nancy started walking in a park at 6:00 a.m. She walked for 1 hour. At what time did she stop walking?

Solution:

Starting time = 6:00

Duration of walking = 1 hour

The time after 1 hour = 6 + 1 = 7

Nancy stopped walking at 7 o’clock.

Questions and Answers on Duration of Time:

1. How many minutes have passed from the time on:

(i) Clock A and Clock B __________

(ii) Clock C and Clock D __________

1. (i) 50 minutes

(ii) 15 minutes

2. How many hours and minutes are there between:

(i) 7:20 a.m. and 11:10 a.m.

(ii) 6:15 a.m. and 9:40 a.m.

(iii) 9:00 a.m. and 7:30 p.m.

(iv) 5:20 p.m. and 7:40 p.m.

2. (i) 3 hours 50 minutes

(ii) 3 hours 25 minutes

(iii) 10 hours 30 minutes

(iv) 2 hours 20 minutes

3. What will be the time after 1 hour?

(i) 8:00 → _____

(ii) 9:00 → _____

(iii) 10:00 → _____

(iv) 8:30 → _____

(v) 10:30 → _____

(vi) 5:30 → _____

3. (i) 9:00

(ii) 10:00

(iii) 11:00

(iv) 9:30

(v) 11:30

(vi) 6:30

4. How many hours have passed when the hour hand moved from:

(i) 10 to 12

(ii) 4 to 8

(iii) 9 to 12

(iv) 5 to 9

(v) 8 to 12

(vi) 11 to 12

4. (i) 2 hours

(ii) 4 hours

(iii) 3 hours

(iv) 4 hours

(v) 4 hours

(vi) 1 hour

5. Draw hands to show the time 1 hour after the given time in each set of clocks.

5.

6. What will be the time 6 hours 30 minutes after the following times.

(i) 9:00 a.m.

(ii) 10:45 p.m.

(iii) 6:15 a.m.

(iv) 2:30 p.m.

6. (i) 3:30 p.m.

(ii) 5:15 a.m.

(iii) 12:45 p.m.

(iv) 9:00 p.m.

7. Fill the missing places in the table.

 S.No. Start Time End Time Elapsed Time (i) 10:45 a.m. 1:15 p.m. __________ (ii) 4:30 p.m. 11:15 p.m. __________ (iii) 2:00 p.m. 3:15 a.m. __________ (iv) 9:32 p.m. __________ 2 hours 16 minutes (v) __________ 8:47 a.m. 6 hours 14 minutes

7. (i) 2 hours 30 minutes

(ii) 6 hours 45 minutes

(iii) 13 hours 15 minutes

(iv) 11:48 p.m.

(v) 2:33 a.m.

Worksheet on Word Problems on Time Duration:

8. On May 1, The Sun rose at 5:05 a.m. and set at 7:45 p.m. For how long could the Sun be seen?

9. Sharon is unwell and the doctor advised her to drink Glucose after every 45 minutes. If Sharon drank a glass of Glucose at 7:30 a.m., then at what time will she take the next two glasses of Glucose?

10. The weather report of a city is updated after every 5$$\frac{1}{2}$$ hours. If the report was updated at 8:30 p.m., then when will the next update take place?

11. Rita took 7 hours 10 minutes to travel from state A to State B. If she reached the state B at 12:00 noon, at what time did she leave from the state A.

12. Mike completed his work in 1 hour 35 minutes. He started at 4:45 p.m. At what time did he complete his work?

13. Tine started her homework at 6:30 p.m. and finished at 7:10 p.m. Find the elapsed time.

(i) 1 hour 40 min

(ii) 30 min

(iii) 40 min

(iv) 1 hour 5 min

13. (iii) 40 min

14. Sam started decorating his Christmas Tree at 7:35 p.m.. He completed his work in 1 hour 23 min. At what time did he finish his work?

(i) 9:50 a.m.

(ii) 8:58 p.m.

(iii) 7:40 a.m.

(iv) 8:50 p.m.

14. (ii) 8:58 p.m.

15. In a school, the first period starts at 7:40 a.m. If each period is for 30 minutes, what will be the time at the end of the third period?

(i) 9:30 a.m.

(ii) 10:00 a.m.

(iii) 9:10 a.m.

(iv) 11:00 p.m.

15. (iii) 9:10 a.m.

## You might like these

• ### Months of the Year | List of 12 Months of the Year |Jan, Feb, Mar, Apr

There are 12 months in a year. The months are January, February, march, April, May, June, July, August, September, October, November and December. The year begins with the January month. December is the last month of the year. A year has 365 days.

• ### Months and Days | Months in a Year | Months of the Year | Millennium

We will discuss about the months and days in a year. There are 12 months in a year. They are: January, February, March, April, May, June, July, August, September, October, November and December.

• ### Days of the Week | 7 Days of the Week | What are the Seven Days?

We know that, seven days of a week are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday. A day has 24 hours. There are 52 weeks in a year. Fill in the missing dates and answer the questions: 1. John was born 6th January. What day of the week is it?

• ### Quarter Past an Hour | Tell & Write the Time to Quarter Past the Hour

In a quarter hour, the minute hand moves 15 minutes on the clock. The minute hand points at 3. We say time is quarter past an hour. Look at the clock. The minute hand is at 3. The hour hand is between 1 and 2. So, the time is quarter past 1. We write 1 :15.

• ### Half Past an Hour | What does Half Past Mean? | Half an Hour|Half Past

We learnt that, one hour is equal to 60 minutes. When one hour is divided into two, it is half an hour or 30 minutes. The minute hand points at 6. We say, 30 minutes past an hour or half past an hour. Look at the clock. The minute hand is at 6. The hour hand is between 1 and

• ### How to Read a Watch or a Clock? |Read the Time Shown |Telling the Time

How to read a watch or a clock? The three figures will help us to read a clock. Hour hand indicates hours and Minute-hand indicates minutes.

• ### Measuring Time | Standard Unit of Time | Big Unit of Time | Leap Year

Measuring time will help us to do our daily work on time. We get up from bed early in the morning, do our work during the day time, and go to bed at night.

• ### Measuring Capacity | Standard Unit of Capacity | Litre | Millilitres

We will discuss about measuring capacity. The milkman measures milk in liters. Petrol is given in liters. Mobil oil is sold in liters. Two milk bottles contain 1 liter of milk. One milk bottle

• ### What is Mass? |Standard unit of Mass or Weight|Measure the Mass |Units

In third grade measurement of mass we will discuss about what is mass, standard unit of mass or weight etc,. What is mass? The quantity of matter in an object is called its mass. We must know that the

• ### Measuring Mass | Addition and Subtraction of Mass | Measure of Mass

We will discuss about measuring mass. We know the vegetable seller is weighing potatoes in kilogram. The goldsmith is weighing a ring in grams. The wheat bags are weighing in quintals.

• ### 2nd Grade Measurement of Length Worksheet |Measuring Length Worksheets

In 2nd grade measurement of length worksheet we will solve the problems on non-standard unit of length, standard unit of length, using a scale, using a ruler and word problems on measurement of length.

• ### Using a Ruler | Measure a Length | Length of an Object|Find the Length

We will learn measure a length using a ruler. The ruler given below has 15 cm marked on it. The length of the ruler is 15 cm. To measure a length of a pencil, place at the ‘0’ of the ruler at the one end of the pencil and note the position of the other end.

• ### Using a Scale | Measure the Length | Meter Rod | Metal Tape | Ruler

We will learn how to measure the length using a scale. A cloth merchant uses a rod to measure the length of the cloth. This is called a meter rod. A tailor uses a tape to take measurements for stitching a cloth. A carpenter or mason uses a metal tape to measure the length.

• ### Standard Unit of Length | Unit Kilometre|Meter (m) and Centimetre (cm)

What is the standard unit of length? We know some non-standard units of length like hand-span, cubit, etc., and also with standard units of length like meter and centimetre. We have seen a meter-rod

• ### 3rd Grade Worksheet on Time | Conversion of Time | Telling Time | Ans

In 3rd Grade Time Worksheet we will solve the problems on reading times in 5-minute intervals, quarter past and quarter to, read and write the time shown on the given clocks in two ways, expressing time in a.m. and p.m., duration of time, 24-hours clock, converting 12-hours

Related Concepts