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    Question

    Section 1

    A 240 m long train crosses a platform twice its length

    in 3 min. Find the speed of the train.
    A 4 m/s Correct Answer Incorrect Answer
    B 5 m/s Correct Answer Incorrect Answer
    C 6.5 m/s Correct Answer Incorrect Answer
    D 7 m/s Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of train = (Length of train + Length of Platform)/Required time Length of train = 240 m Crossing time of platform = 3 × 60 = 180 sec Length of platform = 240 × 2 = 480 m Let the speed of train be x. Speed of train = (240 + 480)/180 ⇒  x = 4 m/s

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