Discussion of Question with ID = 042 under Distance-and-Time

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Question

A city bus has an average speed of 20 km/h if it doesn't stop anywhere. But if it stops in-between the average speed drops to 15 km/h. How many minutes does it stop in 1 hour?

A

15 mins.

B

16 mins.

C

14 mins.

D

6 mins.

Soln.
Ans: a

Due to stoppages, it covers a less distance of 20 - 15 = 5 in one hour. The time taken for that distance would be the wastage due to stopping = $5/20$ × 60 = 15 mins.


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