Speed = Distance/Time Total distance to be covered = 600 km Average speed of the train = 100 km/hr Time taken to cover the total distance without stopping = 6 hours Number of times the train will stop in covering a distance of 600 km =
600
75
=8 times Extra time taken by the train due to stoppage = 8 × 3 minutes = 24 minutes Since after 525 km, the train does not need to stop to cover the remaining 75 km distance, therefore, the total time taken by the train to reach its destination = 6 hours 21 minutes.