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      Question

      A train crosses a pole and a platform of length 480 metres

      in 8 seconds and 20 seconds, respectively. Find the length of train.
      A 280 metres Correct Answer Incorrect Answer
      B 300 metres Correct Answer Incorrect Answer
      C 320 metres Correct Answer Incorrect Answer
      D 340 metres Correct Answer Incorrect Answer
      E 360 metres Correct Answer Incorrect Answer

      Solution

      Let the speed of train be 'v' m/s.
      Length of train = '8v' metres

      So, (8v + 480) ├╖ 20 = 'v'

      Or, 8v + 480 = 20v
      Or, 12v = 480
      So, 'v' = 40

      Therefore, length of the train = 8 ├Ч 40 = 320 metres

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