Excluding stoppages,the speed of the bus is 54kmph and
including stoppages,it is 36kmph. For how many minutes does the bus stop per hr	Choose the correct option
A) 12 min B) 11 min C) 13 min D) 19 min E) 20 min
Due to stoppages,it covers 18km less.   time taken to cover 18 km is [  18/54 *60= 
<gadget id="calculator">  18/54 *60</gadget>
<output>20</output>
20min   Answer is 20 min.
<result>E</result>
Excluding stoppages,the speed of the bus is 54kmph and
including stoppages,it is 36kmph. For how many minutes does the bus stop per hr