Excluding stoppages, the speed of a bus is 64 kmph and including stoppages, it is 50 kmph. For how many minutes does the bus stop per hour?	Choices:
A) 15.5
B) 12.3
C) 10.5
D) 10.12
E) 13.12
Due to stoppages, it covers 14 km less.   Time taken to cover 14 km = ((14/64)Ã—60) = 13.12 min.   Option(13.12) is correct
<result>E</result>
Excluding stoppages, the speed of a bus is 64 kmph and including stoppages, it is 50 kmph. For how many minutes does the bus stop per hour?