A train overtakes two persons, who are walking in the same direction in which the train is going at the rate of 2km/hr and 4 km/hr, and passes them completely in 9 and 10 seconds respectively. The length of the train is –
A train overtakes two persons walking along a railway track. The first person walks at 9 km/hr and the other walks at 10.8 km/hr. The train needs 16.8 and 17 seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train?