A 210 m long train takes 6 s to cross a man running at 9km/h in a direction opposite to that of the train . What is the speed of the train ? (in km/h)

A train 110 m long passes a man running at a speed of 6km/hr in the direction opposite to the train in 6 seconds. What is the speed of the train?

A 100m long train,takes 7(1)/(5) seconds to cross a man walking at the rate of 5km/hr in the direction opposite to that of 5km/hr in the the speed of the train?