Excluding stoppages, the speed of a bus is 80 kmph and including stoppages, it is 60 kmph. For how many minutes does the bus stop per hour?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 15
Per hour rest time = [speed difference/max speed] × time
= [(80 - 60)/80] × 60 = 1/4 × 60 = 15 mins