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    ​Two trains 240 m and 320 m long are travelling on parallel tracks in the same direction at speeds of 59 km/h and 50 km/h. How long will it take for t
    Question

    Two trains 240 m and 320 m long are travelling on parallel tracks in the same direction at speeds of 59 km/h and 50 km/h. How long will it take for the two trains to pass each other from the instant they meet?

    A.

    3 min 44 sec


    B.

    3 min 24 sec


    C.

    2 min 18 sec


    D.

    2 min 24 sec

    Correct option is A

    Given:

    Length of two trains = 240m and 320m

    Speed of train = 59km/hr and 50 km/hr respectively

    Formula Used:

    Time = DistanceSpeed \frac{Distance}{Speed}​​

    Solution:

    Relative speeds of train when moving in same direction = 59 - 50 = 9km/hr

    Speed in metre per second = 9×5189 \times \frac{5}{18} = 2.5m/sec

    Total distance = Total length of train = 240 + 320 = 560metres

    Time taken to cross = 5602.5\frac{560}{2.5}​ = 224seconds

    Time in minutes = 22460=34460\frac{224}{60} = 3\frac{44}{60}​ = 3 minutes 44 seconds

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