New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A train running with a speed of 117 km/hr can cross a

    pole in 19 seconds and a platform in 23 seconds. Find the length of the platform.
    A 130 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
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of the train = 117 × (5/18) = 32.5 m/sec Length of the train = 32.5 × 19 = 617.5 metres Let the length of the platform be ‘x’ metres Therefore, 617.5 + x = 32.5 × 23 Or, x = 747.5 – 617.5 = 130 metres

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