Excluding stoppages,the speed of the bus is 54kmph and
including stoppages,it is 18kmph. For how many minutes does the bus stop per hr Choose the correct choice from the following answers.
A) 12 min B) 11 min C) 13 min D) 20 min E) 40 min
Due to stoppages,it covers 36km less.   time taken to cover 36 km is [  36/54 *60= 
<gadget id="calculator">  36/54 *60</gadget>
<output>40</output>
40min   Answer is 40 min.
<result>E</result>
Excluding stoppages,the speed of the bus is 54kmph and
including stoppages,it is 18kmph. For how many minutes does the bus stop per hr