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      Question

      A train of length 360 metres crosses a man standing on

      a platform in 12 seconds. If its speed decreases by 25%, then find the time taken by the train to cross a platform of length 540 metres.
      A 40 seconds Correct Answer Incorrect Answer
      B 50 seconds Correct Answer Incorrect Answer
      C 52 seconds Correct Answer Incorrect Answer
      D 60 seconds Correct Answer Incorrect Answer
      E 56 seconds Correct Answer Incorrect Answer

      Solution

      Speed of train = (360 Γ· 12) = 30 m/s New speed of train = 0.75 Γ— 30 = 22.5 m/s Required time = (360 + 540) Γ· 22.5
      = 900 Γ· 22.5
      = 40 seconds

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