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    Question

    A train 150 m long running at 36 km/hr takes 50 seconds

    to cross a bridge. The length of the bridge is
    A 300 metre Correct Answer Incorrect Answer
    B 425 metre Correct Answer Incorrect Answer
    C 625 metre Correct Answer Incorrect Answer
    D 350 metre Correct Answer Incorrect Answer
    E 650 metre Correct Answer Incorrect Answer

    Solution

    Speed of train = 36 km/hr = 36 × (5/18) = 10 m / sec If the length of bridge be x metre, then ⇒ 10 = (150 + x)/50 ⇒ 150 + x = 500 ⇒ x = 500 – 150 = 350 metre

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