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    Question

    Two trains of lengths 180 m and 120 m move in opposite

    directions at 54 km/h and 36 km/h. Time to cross each other?
    A 18 secs Correct Answer Incorrect Answer
    B 12 secs Correct Answer Incorrect Answer
    C 14 secs Correct Answer Incorrect Answer
    D 21 secs Correct Answer Incorrect Answer

    Solution

    ATQ, 54 km/h = 15 m/s, 36 km/h = 10 m/s Relative speed = 25 m/s Total length = 300 m Time = 300/25 = 12 s

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