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      Question

      A train 275 m long running at 72 km/hr takes 45 seconds

      to cross a bridge. The length of the bridge is
      A 300 metre Correct Answer Incorrect Answer
      B 425 metre Correct Answer Incorrect Answer
      C 625 metre Correct Answer Incorrect Answer
      D 350 metre Correct Answer Incorrect Answer

      Solution

      Speed of train = 72 km/hr = 72 Γ— (5/18) = 20 m / sec If the length of bridge be x metre, then β‡’ 20 = (275 + x)/45 β‡’ 275 + x = 900 β‡’ x = 900 – 275 = 625 metre

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