📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    Question

    Train A, when travelling at a speed of 108 km/h, crosses

    a pole in 6 seconds. Find the time taken by Train A to cross another Train B of length 50% more than Train A, coming from the opposite direction at 72 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 = 108 × 5/18 = 30 m/s
    Length of Train A = 30 × 6 = 180 m
    Length of Train B = 1.5 × 180 = 270 m
    Speed of Train B = 72 × 5/18 = 20 m/s
    Total distance = 180 + 270 = 450 m
    Relative speed = 30 + 20 = 50 m/s
    Time = 450 / 50 = 9 seconds

    Practice Next

    Relevant for Exams:

    ask-question