Excluding stoppages, the speed of a bus is 80 km/hr and including stoppages, it is 70 km/hr. For how many minutes does the bus stop per hour?	Pick
A) 11 min B) 10 min C) 8 min D) 6 min E) 5 min
Due to stoppages, it covers 10 km less.   Time taken to cover 10 km = 10/80 * 60   = 8 min.   Answer:8 min
<result>C</result>
Excluding stoppages, the speed of a bus is 80 km/hr and including stoppages, it is 70 km/hr. For how many minutes does the bus stop per hour?