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E:\Working\Focus_Learning\Math_Genius_5_(05-10-2023)\Open_Files\CHAP_09
\\November 23, 2023 10:50 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Time interval from 12 midnight to 5:30 a.m., the next day
= 5 hours 30 minutes h min
10
2
So, total time taken = 2 h 10 min + 5 h 30 min + 5 30
= 7 hours 40 minutes 7 40

Thus, the duration of journey is 7 hours 40 minutes.

Practice Time 9C

1. Choose the correct option.
(a) 6 years 8 months + 8 years 6 months = ?

(i) 15 years 4 months (ii) 15 years 2 months

(iii) 14 years 8 months (iv) 14 years 4 months

(b) 9 hours 25 minutes – 3 hours 45 minutes = ?
(i) 5 hours 40 minutes (ii) 3 hours 35 minutes

(iii) 4 hours 15 minutes (iv) 4 hours 45 minutes
2. Add the following:

(a) 9 min 28 s and 6 min 16 s (b) 9 h 32 min and 6 h 26 min

(c) 2 days 17 h and 3 days 15 h (d) 5 weeks 4 days and 4 weeks 6 days

(e) 5 years 4 months and 3 years 7 months
3. Subtract the following:

(a) 20 min 48 s from 30 min (b) 15 min 33 s from 18 min 40 s
(c) 8 h 40 min from 24 h (d) 2 days 12 h from 4 days 20 h

(e) 3 weeks 5 days from 5 weeks 3 days (f) 15 years 9 months from 20 years

4. What time will it be:
(a) 3 h 45 min after 8:30 p.m.? (b) 5 h 30 min after 8:40 p.m.?

5. What time was it:

(a) 4 h before 1:30 p.m.? (b) 7 h 25 min before 3:20 p.m.?
6. Find the time interval between 7:25 a.m. and 3:10 p.m.
7. Solve the following word problems.

(a) Shaneya's school starts at 7:45 a.m. and closes at 1:30 p.m. Find her school hours.

(b) A shop opens at 10:30 a.m. and closes at 7:00 p.m. How long does the shop
remains open?

(c) A bus leaves the bus stop at 5:30 a.m. and reaches its destination at 7:45 p.m.
Find the time duration of the journey.

190 Mathematics-5