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      Question

      A train running at 90 km/h crosses an electric pole in

      18 seconds and a platform in 65 seconds. What is the length of the platform?
      A 1175 m Correct Answer Incorrect Answer
      B 1250 m Correct Answer Incorrect Answer
      C 1050 m Correct Answer Incorrect Answer
      D 1020 m Correct Answer Incorrect Answer

      Solution

      Let the length of the platform be P meters. 90 km/h = 90 ÷ 18/5 = 25 m/sec Hence, the length of the train = 25 × 18 = 450 meters. According to the question, 25 × 65 = (450 + P) ⇒ 1625 = 450 + P   ⇒ P= 1175  The length of the platform is 1175 m.

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