Question

Without stoppage, a train travels at an average speed of 75 km/h and with stoppages it covers the same distance at an average speed of 60 km/h. how many minutes per hour does the train stop?

Answer 1

Time taken in second case to travel 60km=1hr
Time taken in first case to travel 60km=60/75hr
therefore, the difference between these two times will be equal to the time the train stops per hour and that will be= (1-60/75)hr
= 15/75hr = 12 min.