Excluding stoppages the speed of bus is 54 kmph and including stoppages, it is 45 Kmph. For how many minutes does the bus stop per hour?
সমাধান
সঠিক উত্তর: Option A
Due to stoppages, it covers 9 km less.
Time taken to cover 9 km, (9/54)x 60min= 10 min.