Question
1200 metres long train crosses a man who is moving in
the same direction with a certain speed in 25 seconds. If the same train can cross a pole in 20 seconds with the same speed, then find the speed of the man.Solution
Let the speed of the man be x m/sec. Speed of train = 1200/20 = 60 m/sec Relative speed of the train = (60 - x) m/sec According to the question, = (60 - x) = 1200/25 = x = 60 - 48 = x = 12 Therefore the speed of the man = 12 m/sec
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