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      Question

      A train moving at a speed of 135

      km/h takes 6 seconds to pass a stationary vertical tree. How long will it take for the train to completely cross a platform that is 450 meters long?
      A 18 secs Correct Answer Incorrect Answer
      B 12 secs Correct Answer Incorrect Answer
      C 20 secs Correct Answer Incorrect Answer
      D 24 secs Correct Answer Incorrect Answer

      Solution

      ATQ, Speed of train = 135 Γ— (5/18) = 37.5 /sec Therefore, length of the train = 37.5 Γ— 6 = 225 metres Time taken by the train to cross the platform = (225 + 450)/37.5 = 18 seconds

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