Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45kmph. For how many minutes does the bus stop per hour? Choose one
A) 12
B) 11
C) 10
D) 9
E) 8
Explanation:   Speed of the bus excluding stoppages =54 kmph   Speed of the bus including stoppages =45 kmph   Loss in speed when including stoppages =54âˆ’45=9 kmph   â‡’ In 1 hour, bus covers 9 km less due to stoppages.   Hence, time in which the bus stops per hour   = Time taken to cover 9 km   =distance/speed =9/54hour=1/6hour=60/6= 
<gadget id="calculator">60/6</gadget>
<output>10</output>
10min   ANSWER IS 10
<result>C</result>
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45kmph. For how many minutes does the bus stop per hour?