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      Question

      A train running at  54 km/h  crosses a  pole  in 20

      seconds and a  platform  in 32 seconds. What is the length of the platform?
      A 175 m Correct Answer Incorrect Answer
      B 200 m Correct Answer Incorrect Answer
      C 180 m Correct Answer Incorrect Answer
      D 145 m Correct Answer Incorrect Answer

      Solution

      Speed = 54 × (5/18) = 15 m/s Length of train = 15 × 20 = 300 m Total distance (train + platform) = 15 × 32 = 480 m Platform length = 480 − 300 = 180 m

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