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    Question

    A train running at 28 m/s can cross a platform of length

    450 metres in 30 seconds. Calculate the length of the train.
    A 300 m Correct Answer Incorrect Answer
    B 450 m Correct Answer Incorrect Answer
    C 390 m Correct Answer Incorrect Answer
    D 515 m Correct Answer Incorrect Answer

    Solution

    ATQ,

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

    According to the question:

    Image

    450+x=840

    Or, x=840−450

    Or, x=390

    Therefore, the length of the train is 390 metres.

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