Question

Without stoppage, a train travels a certain distance with an average speed of 60 km/h, and with stoppage it covers the same distance with an average speed of 40 km/h. on an average, how many minutes per hour does train stop during the journey ?

Answer 1

Time taken in second case to travel 40 km=1hr
Time taken in first case to travel 40 km = 40/60hr
therefore, the difference between the two times will be equal to the time the train stops per hour and that will be= (1-40/60)hr = 20/60hr = 20 min