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    A 270 m long train running at a speed of 120 km/h crosses another train running in opposite direction at the speed of 80 km/h in 9 seconds. What is th
    Question

    A 270 m long train running at a speed of 120 km/h crosses another train running in opposite direction at the speed of 80 km/h in 9 seconds. What is the length of the other train?

    A.

    280 m

    B.

    240 m

    C.

    260 m

    D.

    230 m

    Correct option is D

    Given:
    Speed of Train 1 = 120 km/h
    Speed of Train 2 = 80 km/h
    Time = 9 seconds
    Formula Used:
    Relative speed when trains are moving in opposite directions = Speed of Train 1 + Speed of Train 2.
    Solution:
    Relative speed = 120 + 80 = 200 km/h = 200 * (1000/3600) = 500/9 m/s.
    Total distance covered in 9 seconds = 500/9 * 9 = 500 m.
    Thus, length of the second train = Total distance - Length of the first train = 500 - 270 = 230 m.

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