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      Question

      The speed of train X is 72km/h and it takes 25 seconds

      to cross a pole. Find the time taken by train X to cross train Y running in the same direction at 36km/h, if the length of train Y is 350m.
      A 80 seconds Correct Answer Incorrect Answer
      B 85 seconds Correct Answer Incorrect Answer
      C 90 seconds Correct Answer Incorrect Answer
      D 95 seconds Correct Answer Incorrect Answer

      Solution

      Length of the train X = 72 × 5/18 × 25 = 500m
      Required time = (500 + 350)/(36 × 5/18) = 850/10 = 85 seconds

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