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    Question

    A train running with a speed of 99 km/hr can cross a

    pole in 13 seconds and a platform in 17 seconds. Find the length of the platform.
    A 140 metres Correct Answer Incorrect Answer
    B 110 metres Correct Answer Incorrect Answer
    C 135 metres Correct Answer Incorrect Answer
    D 180 metres Correct Answer Incorrect Answer

    Solution

    Speed of the train = 99 × (5/18) = 27.5 m/sec Length of the train = 27.5 × 13 = 357.5 metres Let the length of the platform be ‘x’ metres Therefore, 357.5 + x = 27.5 × 17 Or, x = 467.5 – 357.5 = 110 metres

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