Excluding stoppages,the speed of the bus is 72kmph and
including stoppages,it is 54kmph. For how many minutes does the bus stop per hr Choose one:	A) 12 min	B) 11 min	C) 13 min	D) 15 min	E) 17 min
Due to stoppages,it covers 18km less.   time taken to cover 18 km is [  18/72 *60= 
<gadget id="calculator">  18/72 *60</gadget>
<output>15</output>
15min   Answer is 15 min.
<result>D</result>
Excluding stoppages,the speed of the bus is 72kmph and
including stoppages,it is 54kmph. For how many minutes does the bus stop per hr