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

• 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

• Reading and Interpreting a Calendar | Calendar | Reading a Calendar

In reading and interpreting a calendar we need to know days in a week, days in a month and months in a year. There are 7 days in a week. The first day of the week is Sunday.

• Units of Time Conversion Chart | Conversion Chart | Us Method | Time

Units of time conversion chart are discussed here in hour, minute, second, day, week, month, and year. We know that there are 12 months in a year. The months of January, March, May, July, August, October and December have 31 days. The months of April, June, September and

• 24 Hour Clock | Air and Railway Travel Timetables | General Time

We normally use 12-hour clock system. The hour hand of the clock goes round the dial twice a day (24 hours). Some departments like railways, Airlines, etc use 24-hour clock system because they do

• Telling Time in a.m. and p.m. | Antemeridian and Postmeridian|Examples

The clock shows time in 12 hour cycle. The first cycle of the hour hand completes at 12 o’clock midday or noon. The second cycle of the hour hand completes at 12 o’clock midnight. ‘a.m.’ and ‘p.m.’ are used to represent the time of the day. ‘a.m.’ stands for ante meridiem,

• Telling Time in 5-minute Intervals | Read the Clock |Nearest 5 Minutes

The clock has numbers from 1 to 12 marked on its dial. These numbers divide the clock face into 12 equal parts. Between any two numbers there are 5 small divisions. Each small division represents a minute. So, the minute hand takes 5 minutes more from one number to the next

• Quarter Past and Quarter To | Quarter Past Hour | Quarter to Next Hour

The hands of clock move from left to right. This is called the clock wise motion. When the minute hand is on the right side of the clock, it shows the number of minutes past the hour. When the minute hand is on the left side of the clock, it shows the number of minutes to

• Different Ways of Reading Time | Many Ways to Read Time | Telling Time

What are the different ways of reading time? There are many ways to read time: (a) When hour-hand is exactly at any number and minute-hand is at 12, we read the time in full hours. If hour hand is at

• 4th Grade Worksheet on Capacity | Measuring Capacity Worksheets

In 4th Grade Worksheet on Capacity we will solve different types of problems on standard unit of capacity, conversion of units of capacity, comparison of capacity, addition of units of capacity, subtraction of units of capacity, word problems on addition of units of capacity

• Worksheet on Word Problem on Measuring Capacity|Capacity Word Problems

Practice the questions given in the worksheet on word problem on measuring capacity (i.e. addition and subtraction). Addition and subtraction of word problems in liters and milliliters

• Addition and Subtraction of Measuring Capacity |Word Problems|Examples

We will discuss about addition and subtraction of measuring capacity. The standard unit of measuring capacity is liter and the smaller unit is milliliter. The short way is to write liter as l and milliliter as ml. The liquid medicines are measured in ml.

Practice the worksheet on addition and subtraction of measuring capacity in liter and milliliter. The questions are related to add, subtract and word problems on finding the sum and difference to

• Conversion of Measuring Capacity | Measuring Capacity | Volume

In conversion of measuring capacity we will learn how to convert litres into millilitres, millilitres into litres, litres and millilitres into millilitres and millilitres into litres and millilitres.

• Standard Unit of Capacity | Measurement of Capacity |Unit of Capacity

In measurement of capacity we will learn about the standard unit of capacity and volume. We know that the maximum quantity of a container or vessel can hold is called its capacity.

• 3rd Grade Worksheet on Weight |Measuring Mass|Mass in Kilograms, Grams

In 3rd grade worksheet on weight we will circle the correct unit of mass, conversion of unit of weight, Conversion of kilograms into grams, Conversion of grams into kilograms, Conversion of kilograms and grams into grams, Conversion of grams into kilograms and grams

Related Concepts