Excluding stoppages, the speed of a bus is 86 kmph and including stoppages, it is 76 kmph. For how many minutes does the bus stop per hour?
Pick one.
A) 7.5 min B) 16 min C) 20 min D) 7 min E) 40 min
D   7 min   Due to stoppages, it covers 10 km less.   Time taken to cover 10 km = (10/86 x 60) min = 7 min
<result>D</result>
Excluding stoppages, the speed of a bus is 86 kmph and including stoppages, it is 76 kmph. For how many minutes does the bus stop per hour?