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    Question

    1500 metres long train crosses a man who is moving in

    the same direction with a certain speed, in 30 seconds. If the same train can cross a tree in 25 seconds with the same speed, then find the speed of the man.
    A 10 m/sec Correct Answer Incorrect Answer
    B 12 m/sec Correct Answer Incorrect Answer
    C 16 m/sec Correct Answer Incorrect Answer
    D 18 m/sec Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of train = 1500/25 = 60 m/sec Let the speed of the man be ‘s’ m/sec Relative speed of the train = (60 – s) m/sec According to the question, (60 – s) = 1500/30 Or, s = 60 – 50 = 10 Therefore, speed of the man = 10 m/sec

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