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    Question

    A train crosses a platform 100 m long in 60 s at a speed

    of 45 km/h. The time taken by the train to cross an electric pole is
    A 8 s Correct Answer Incorrect Answer
    B 52 s Correct Answer Incorrect Answer
    C 1 min Correct Answer Incorrect Answer
    D 40 s Correct Answer Incorrect Answer

    Solution

    Let the length of the train be D,

    Then, S = D/T

    45 x (5/18) = (D + 100)/60

    D = 650 m

    Now, when trains crosses the electric pole

    45 x (5/18) = 650/T

    T = 52 sec

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