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    Question

    The speed of a train is 72 km/hr and it takes 12 seconds

    to cross a man. Find the time taken by train to cross a platform if the ratio of the length of the platform to the train length is 11:6.
    A 34 sec Correct Answer Incorrect Answer
    B 39 sec Correct Answer Incorrect Answer
    C 26 sec Correct Answer Incorrect Answer
    D 42 sec Correct Answer Incorrect Answer

    Solution

    Let the length of train be x m. According to the question, => 72 x (5/18) = x/12 => x = 240 m Length of the platform = 240 x (11/6) = 440 m Required time = (240 + 440)/20 = 34 seconds

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