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Step 5: Divide 160 seconds by 5. 32 seconds

Write 32 seconds as the quotient. 5 160 seconds
15
Thus, 16 hours 32 minutes 40 seconds ÷ 5 10
= 3 hours 18 minutes 32 seconds. 10
0 seconds
Example 3: Divide 8 days 15 hours 12 minutes by 7.

Solution: 1 day
Days hours minutes
7 8 15 12
– 7
1 day
× 24
24 hours + 15 hours
= 39 hours
5 hours
7 39 hours
– 35
4 hours + 12 minutes (4 × 60 = 240 + 12 = 252 minutes)

= 252 minutes
36 minutes
7 252 minutes
– 21
42
– 42
0 minutes

Thus, 8 days 15 hours 12 minutes ÷ 7 = 1 day 5 hours 36 minutes.

Practice Time 9D

1. Multiply the following:
( a) 37 minutes 12 seconds by 3 (b) 6 hours 05 minutes by 3

( c) 8 hours 03 minutes 18 seconds by 6 (d) 7 hours 11 minutes 3 seconds by 8

( e) 2 weeks 5 days by 3 (f) 10 weeks 5 days 10 hours by 2
2. Divide the following:

( a) 15 minutes 48 seconds ÷ 3 (b) 8 hours 16 minutes ÷ 2

( c) 20 hours 45 minutes 30 seconds ÷ 5 (d) 4 days 15 hours 40 minutes ÷ 8

( e) 4 years 9 months 24 days ÷ 6
3. Suyash rides 13 kilometres in 1 hour 56 minutes 47 seconds on a bicycle. Find the
time taken to ride 1 kilometre, if he rides at a uniform speed.

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