Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 41 kmph. For how many minutes does the bus stop per hour? Choices:	A) 7 min	B) 8 min	C) 14.4 min	D) 10 min	E) 11 min

Rationale: due to stoppages , it covers 13 km less . time taken to cover 13 km = ( 13 / 54 ) x 60 = 14.4 min answer : c
Answer: C