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      Question

      A boat can cover 200 km in upstream in 10 hours and 220

      km in downstream in 4 hours. Find the speed of the stream.
      A 15.5 km/hr Correct Answer Incorrect Answer
      B 12.5 km/hr Correct Answer Incorrect Answer
      C 17.5 km/hr Correct Answer Incorrect Answer
      D 14.5 km/hr Correct Answer Incorrect Answer

      Solution

      Downstream speed = 220/4 = 55 km/hr Upstream speed = 200/10 = 20 km/hr Speed of stream = (55 – 20)/2 = 17.5 km/hr

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