750 metres long train crosses a man who is moving in the same direction with a certain speed, in 50 seconds. If the same train can cross a tree in 20 seconds with the same speed, then find the speed of the man.
Speed of train = 750/20 = 37.5 m/sec Let the speed of the man be ‘s’ m/sec Relative speed of the train = (37.5 – s) m/sec According to the question, (37.5 – s) = 750/50 Or, s = 37.5 – 15 = 22.5 Therefore, speed of the man = 22.5 m/sec
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