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    Question

    A train running with a speed of 135 km/hr can cross a

    pole in 17 seconds and a platform in 27 seconds. Find the length of the platform.
    A 375 metres Correct Answer Incorrect Answer
    B 310 metres Correct Answer Incorrect Answer
    C 235 metres Correct Answer Incorrect Answer
    D 280 metres Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of the train = 135 × (5/18) = 37.5 m/sec Length of the train = 37.5 × 17 = 637.5 metres Let the length of the platform be ‘x’ metres Therefore, 637.5 + x = 37.5 × 27 Or, x = 1012.5 – 637.5 = 375 metres

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