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    Question

    A train 400 m long running at 108 km/hr takes 35 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 650 metre Correct Answer Incorrect Answer

    Solution

    Speed of train = 108 km/hr = 108 × (5/18) = 30 m / sec If the length of bridge be x metre, then ⇒ 30 = (400 + x)/35 ⇒ 400 + x = 1050 ⇒ x = 1050 – 400 = 650 metre

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