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      Question

      What is the length of the bridge which a man riding 21

      km an hour can cross in 3 min.?
      A 600 m Correct Answer Incorrect Answer
      B 1000 m Correct Answer Incorrect Answer
      C 900 m Correct Answer Incorrect Answer
      D 1050 m Correct Answer Incorrect Answer
      E none of these Correct Answer Incorrect Answer

      Solution

      Speed = 21km/hr , Time = 3 minutes = 3 × 60 = 180 seconds, Distance = ? Distance = Speed × Time = 21 × (5 )/18 × 180 = 1050 m

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