Excluding stoppages, the speed of a bus is 52 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?	Choose the correct choice from the following:
A) 7 min
B) 6 min
C) 9 min
D) 8 min
E) 11 min
Due to stoppages, it covers 7 km less.   Time taken to cover 7 km =(7/52)x60 = 8 min   answer : 8 min
<result>D</result>
Excluding stoppages, the speed of a bus is 52 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?