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      Question

      A train 500 m long running at 108 km/hr takes 40 seconds

      to cross a bridge. The length of the bridge is
      A 250 metre Correct Answer Incorrect Answer
      B 450 metre Correct Answer Incorrect Answer
      C 400 metre Correct Answer Incorrect Answer
      D 700 metre Correct Answer Incorrect Answer

      Solution

      Speed of train = 108 km/hr = 108 Γ— (5/18) = 30 m / sec If the length of bridge be x metre, then β‡’ 30 = (500 + x)/40 β‡’ 500 + x = 1200 β‡’ x = 1200 – 500 = 700 metre

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