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      Question

      A 750-metre long train takes 15 seconds to cross a pole.

      If it takes 45 seconds to cross a bridge, then find the length of the bridge.
      A 1.25 km Correct Answer Incorrect Answer
      B 1.5 km Correct Answer Incorrect Answer
      C 1.75 km Correct Answer Incorrect Answer
      D 2.0 km Correct Answer Incorrect Answer

      Solution

      Speed of the train = (750 / 15) = 50 m/s
      Distance covered by the train in 45 seconds = 50 Γ— 45 = 2,250 metres
      Length of the bridge = 2,250 750 = 1,500 metres = (1500 / 1000) = 1.5 km

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