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    Question

    If a train takes 24 seconds to cross a pole and 36

    seconds to cross a 180 metres long bridge, what is the speed of the train?
    A 10 m/s Correct Answer Incorrect Answer
    B 12 m/s Correct Answer Incorrect Answer
    C 15 m/s Correct Answer Incorrect Answer
    D 18 m/s Correct Answer Incorrect Answer

    Solution

    Let the length of the train be ‘L’ metres. ATQ, Or, 36L = 24L + 4320 Or, 12L = 4320 Or, L = 360 metres Therefore, the length of the train is 360 metres. The speed of the train = 360/24 = 15 m/s

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