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    Question

    Time is taken by two trains running in opposite

    directions to cross a man standing on the platform in 30 seconds and 22 seconds respectively. It took 25 seconds for the trains to cross each other. What is the ratio of their speeds?
    A 2:3 Correct Answer Incorrect Answer
    B 3:2 Correct Answer Incorrect Answer
    C 1:4 Correct Answer Incorrect Answer
    D 3:5 Correct Answer Incorrect Answer
    E 4:1 Correct Answer Incorrect Answer

    Solution

    Let the speed one train be x m/s and the speed of the second train be y m/s. Length of the first train = Speed × Time = 30x Length of second train = Speed × Time = 22y So, {(30x + 22y)/(x+y)} = 25 ⇒  30x + 22y = 25x + 25y ⇒  5x = 3y Therefore, x:y = 3:5

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