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There are two trains. The first train is travelling at 52 km/h. The second train is travelling at 68 km/h. It takes 9 seconds for the second train to pass the first train. How long is the second train?

  • Maths - ,

    in 9 seconds
    1st train went 52000(9/3600) or 130 m
    2nd train went 68000(9/3600) or 170 m
    they were in the act of passing 40 m, the length of the train.


    the second train is gaining at 68-52 or 16 km/h
    distance covered at that speed = 16000(9/3600) = 0 m

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