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Question

A man is running at 15 km/hr in a parallel track in the same direction of a train which is moving at 65 km/hr. He is 170 meters ahead of the train. If the length of the train is 150 meters, in what time the train will cross the man?

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Answer- D

Time=Distance/Speed

Distance to be covered = 170 + 150 = 220 meters

Relative speed = 65 - 15 = 50 km/hr = 50 * 5/18 m/s = 125/9 m/s

Time = 220*9/125 = 15.84 sec