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    Question

    Train 'A' having a speed of 25 m/s can cross a man in 6

    seconds. The length of train 'B' is 30 metres more than the length of 'A'. If the speed of 'B' is 35 m/sec and both trains are travelling towards each other, then find the time taken by them to cross each other.
    A 4.5 seconds Correct Answer Incorrect Answer
    B 5.0 seconds Correct Answer Incorrect Answer
    C 5.5 seconds Correct Answer Incorrect Answer
    D 6.0 seconds Correct Answer Incorrect Answer
    E 6.5 seconds Correct Answer Incorrect Answer

    Solution

    Length of train 'A' = 25 × 6 = 150 metres
    Length of train 'B' = 150 + 30 = 180 metres
    Relative speed = 25 + 35 = 60 m/sec
    Required time = (150 + 180) ÷ 60 = 330 ÷ 60 = 5.5 seconds

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