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    Question

    A train of 175 metres is running at a speed of 72 km/h and

    crosses a platform in 36 seconds. Determine the length of the platform.
    A 480 m Correct Answer Incorrect Answer
    B 545 m Correct Answer Incorrect Answer
    C 665 m Correct Answer Incorrect Answer
    D 335 m Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the length of the platform be тАШxтАЩ metres

    Speed of the train = 72 ├Ч (5/18) = 20 m/s

    ATQ,

    (x + 175) = 20 ├Ч 36

    Or, (x + 175) = 720

    Or, x = 720 - 175

    Or, x = 545

    Therefore, the length of the platform = 545 metres

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