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    Question

    How much time a train 200 metres long running at the

    speed of 72 km/hr take to cross a bridge 180 metres in length?         
    A 22 sec. Correct Answer Incorrect Answer
    B 19 sec. Correct Answer Incorrect Answer
    C 28 sec. Correct Answer Incorrect Answer
    D 12 sec. Correct Answer Incorrect Answer

    Solution

    Distance (Length of the train + length of the bridge) = 200 + 180 = 380 Speed of Train = 72 km/hr = 72×5/18  = 20 m/sec.   Time = Distance/Speed  = 380/20  = 19 sec.

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