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      Question

      1400 metres long train crosses a man who is moving in

      the same direction with a certain speed in 25 seconds. If the same train can cross a pole in 20 seconds with the same speed, then find the speed of the man.
      A 14 m/sec Correct Answer Incorrect Answer
      B 15 m/sec Correct Answer Incorrect Answer
      C 12 m/sec Correct Answer Incorrect Answer
      D 18 m/sec Correct Answer Incorrect Answer

      Solution

      Let the speed of the man be ‘x’ m/sec. Speed of train = 1400/20 = 70 m/sec Relative speed of the train = (70 – x) m/sec According to the question, => (70 – x) = 1400/25 => x = 70 – 56 => x = 14 Therefore the speed of the man = 14 m/sec

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