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    Question

    Two trains X and Y whose length are in ratio of 5:8 and

    time taken to cross a man standing on a platform is 5:2. If the speed of the train X is 24 km/h find speed of the train Y in m/s.
    A 12 m/s Correct Answer Incorrect Answer
    B 17 m/s Correct Answer Incorrect Answer
    C 27 m/s Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    Let the length of train X = 5a , time = 5b Speed = a/b Let the length of train Y = 8a , time = 2b Speed = 4a/b Ratio of the speed =   = 1 : 4 Speed of train Y = 24 × 4 = 96 km/h in m/s = 96 × 5/18 = 27 m/s ( approx )

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