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    Question

    Train A, moving at 90 km/h, crosses a pole in 8 seconds.

    Find the time it takes to cross another train of equal length, coming from the opposite direction at 90 km/h.
    A 6 seconds Correct Answer Incorrect Answer
    B 7 seconds Correct Answer Incorrect Answer
    C 8 seconds Correct Answer Incorrect Answer
    D 9 seconds Correct Answer Incorrect Answer

    Solution

    Speed of Train A = 90 × 5/18 = 25 m/s
    Length of Train A = 25 × 8 = 200 m
    Length of Train B = 200 m
    Speed of Train B = 90 × 5/18 = 25 m/s
    Total length = 200 + 200 = 400 m
    Relative speed = 25 + 25 = 50 m/s
    Time = 400 / 50 = 8 seconds

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