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    Question

    A train takes 18 seconds to cross a 120-metre-long

    platform. If the speed of the train is 36 km/h, then find the time taken by the train to cross a 240-metre-long bridge.
    A 10 sec Correct Answer Incorrect Answer
    B 15 sec Correct Answer Incorrect Answer
    C 20 sec Correct Answer Incorrect Answer
    D 30 sec Correct Answer Incorrect Answer

    Solution

    Let the length of the train be 'x' metres.

    And speed of the train = 36 X (5/18) = 10 m/s

    So, {(x + 120) /10} = 18

    Or, x + 120 = 180

    So, x = 60

    So, required time = {(240 + 60) /10} = 30 seconds

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