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?

** Option:**

**A.**10

**B.**12

**C.**9

**D.**14

**Answer: A . a**

** Justification:**

Due to stoppages, it covers 9 km less.

Time taken to cover 9 km = (9/54) * 60 min = **10 min**