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?	Pick one
A) 9	B) 10	C) 11	D) 12	E) 13
Due to stoppages, it covers 9 km less.   Time taken to cover 9 km =	9/54	x 60	min	= 10 min.   answer :10
<result>B</result>
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?