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    Question

    A train 120 m long crosses another train 150 m long,

    coming from the opposite direction, in 10 seconds. If the speed of the first train is 54 km/h, find the speed of the second train.
    A 43.2 km/h Correct Answer Incorrect Answer
    B 50 km/h Correct Answer Incorrect Answer
    C 56.6 km/h Correct Answer Incorrect Answer
    D 48 km/h Correct Answer Incorrect Answer

    Solution

    Relative speed = (120 + 150)/10  = 27 m/s = 97.2 km/h. Speed of second train = 97.2 - 54 = 43.2 km/h.  Correct option: a

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