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    Question

    A 400 m long train crosses a platform twice its length

    in 2 min. Find the speed of the train.
    A 10 m/s Correct Answer Incorrect Answer
    B 7 m/s Correct Answer Incorrect Answer
    C 11 m/s Correct Answer Incorrect Answer
    D 8.5 m/s Correct Answer Incorrect Answer

    Solution

    Speed of train = (Length of train + Length of Platform)/Required time Length of train = 400 m Crossing time of platform = 2 ├Ч 60 = 120 sec Length of platform = 400 ├Ч 2 = 800 m Let the speed of train be x. Speed of train = (400 + 800)/120 тЗТ ┬аx = 10 m/s

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