Discussion of Question with ID = 022 under Distance-and-Time

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Question

A city bus has an average speed of 23 km/h if it doesn't stop anywhere. But if it stops in-between the average speed drops to 17 km/h. How many minutes does it stop in 1 hour?

A

$15{15/23}$ mins.

B

$17{9/22}$ mins.

C

$13{12/25}$ mins.

D

$17{4/25}$ mins.

Soln.
Ans: a

Due to stoppages, it covers a less distance of 23 - 17 = 6 in one hour. The time taken for that distance would be the wastage due to stopping = $6/23$ × 60 = $15{15/23}$ mins.


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