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      Question

      A train running with a speed of 90 km/hr can cross a

      pole in 20 seconds and a platform in 22 seconds. Find the length of the platform.
      A 30 metres Correct Answer Incorrect Answer
      B 55 metres Correct Answer Incorrect Answer
      C 40 metres Correct Answer Incorrect Answer
      D 50 metres Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Speed of the train = 90 × (5/18) = 25 m/sec Length of the train = 25 × 20 = 500 metres Let the length of the platform be ‘x’ metres Therefore, 500 + x = 25 × 22 Or, x = 550 – 50 = 50 metres

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