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\\September 30, 2025 12:00 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74

3. Ram travelled 15 hours 20 minutes by one bus and 13 hours 54 minutes by
another bus. How much time did he travel by both buses?

4. Nitu’s mother takes 42 minutes 12 seconds to make lunch and
53 minutes 28 seconds to make dinner. How much time does

she spend cooking?

5. Putul takes 55 minutes 20 seconds to complete her homework. Her brother

Ajay takes 1 hour 10 minutes 20 seconds to complete his homework. Who takes
more time to complete his/her homework and by how much?

time duRation

The time taken to finish an activity is called its duration. If we know the starting time
and finishing time of an activity, we can find its duration.

example 1: Bhawna left for school at 7:15 a.m. and reached school at 7:45 a.m. How

much time did she take to reach school?

Solution: + 30 minutes

7:00 7:15 7:30 7:45 8:00

Starting time Reaching time Duration

7:15 a.m. 7:45 a.m. 30 minutes

Thus, Bhawna took 30 minutes to reach school.

example 2: A bus left Muzaffarnagar at 6:45 p.m. and reached
Delhi at 10:30 p.m. How much time did the bus take to reach

Delhi?

Solution:
+ 15 + 1 + 1 + 1 + 30
minutes hour hour hour minutes
h min

6:00 6:45 7:00 8:00 9:00 10:00 10:30 11:00 9 90
10 30
Starting time Reaching time Duration – 6 45

6:45 a.m. 10:30 a.m. 3 hours 45 minutes 3 45

Thus, the bus took 3 hours 45 minutes to reach Delhi from Muzaffarnagar.

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