Page 123 - Math Skill - 4

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Exercise 9.3

1. Write a.m. or p.m. to make the time table of Vishal.
(a) Vishal wakes up at 5:30 in the morning.

(b) He brushes his teeth at 5:45 in the morning. Challenge

(c) He comes back from school at 2:00. I m a unit of time, marking a single
(d) He watches TV at 5:15 in the evening. moment’s chime. In sixty of me, a

(e) He goes to play at 5:45 in the evening. minute you will find. Though I pass
unnoticed, never behind what am I,
(f) He goes to bed at 9:30. young and old?
2. Write the time in a.m. or p.m.

(a) 5:45 in the evening (b) 2:10 at afternoon (c) 6:20 in the morning

(d) 11:15 at night (e) 12:05 at night (f) 3:25 at night

3. What time will it be?
(a) 5 hours after 5:30 p.m. (b) 12 hours after 4:15 a.m.

(c) 6 hours after 3:15 p.m. (d) 2 hours 30 minutes after 6:00 a.m.
(e) 7 hours 15 minutes before 7:00 a.m. (f) 3 hours 15 minutes after 2:30 a.m.

Duration of an Activity

Anjali has to reach in
school Anjali leaves her school
at 7:30 a.m. at 1:15 p.m.

How much time did she spend in the school?

Anjali’s duration of stay in school Total time Anjali spent in her school
7:30 a.m. — 8:00 a.m. → 30 minutes = (4 + 1) hours + (30 + 15) minutes

8:00 a.m. — 12:00 noon → 4 hours = 5 hours + 45 minutes
12:00 noon — 1:00 p.m. → 1 hour = 5 hours 45 minutes

1:00 p.m. — 1:15 p.m. → 15 minutes

Thus, we can calculate the duration of a particular activity. The time taken to complete an
activity is called the duration of that activity.