Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

9
10
12
20

Correct Answer: 10

Explanation:

Due to stoppages, it covers 9 km less.

Time taken to cover 9 km =	❨	9	x 60	❩min	= 10 min.
		54

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