Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
9
10
12
20
Explanation:
Due to stoppages, it covers 9 km less.
Time taken to cover 9 km =$\left(\dfrac{9}{54} \times 60 \right)$min
= 10 min
Due to stoppages, it covers 9 km less.
Time taken to cover 9 km =$\left(\dfrac{9}{54} \times 60 \right)$min
= 10 min