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      Question

      The speed of a train is 108 km/hr and it takes 14

      seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of the platform to the train length is 10:7.
      A 32 sec Correct Answer Incorrect Answer
      B 34 sec Correct Answer Incorrect Answer
      C 48 sec Correct Answer Incorrect Answer
      D 42 sec Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the length of train be x m. According to the question, => 108 x (5/18) = x/14 => x = 420 m Length of the platform = 420 x (10/7) = 600 m Required time = (420 + 600)/30 = 34 seconds

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