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    Question

    A train running at 90 km/h crosses an electric pole in

    18 seconds and a platform in 55 seconds. What is the length of the platform?
    A 925m Correct Answer Incorrect Answer
    B 975m Correct Answer Incorrect Answer
    C 1125m Correct Answer Incorrect Answer
    D 1175m Correct Answer Incorrect Answer

    Solution

    Let the length of the platform be P meters. 90 km/h = 90 ÷ 18/5 = 25 m/sec Hence, the length of the train = 25 × 18 = 450 meters. According to the question, 25 × 55 = (450 + P)   1375 = 450 + P     P= 925  The length of the platform is 925 m.

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