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Discussion :: Problems on Trains

  1. Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?

    2. A.

    23 m
    B.

    2  \({{2} \over 9}\) m
    C.

    27 m
    D.

    29 m

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    Answer : Option C

    Explanation :

    Relative speed =(40-20) km/hr = \((20\times\frac{5}{18})m/sec =( \frac{50}{9}) m/sec\)
     
    Therefore Length of faster train = \((\frac{50}{9}\times5)m =(\frac{250}{9})m =27 (\frac{7}{9})m\)

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