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      Question

      A boat can cover 170 km in downstream in 2 hours and 145

      km in upstream in 5 hours. Find the speed of boat in still water.
      A 57 km/hr Correct Answer Incorrect Answer
      B 10 km/hr Correct Answer Incorrect Answer
      C 25 km/hr Correct Answer Incorrect Answer
      D 65 km/hr Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Downstream speed of the boat = 170/2 = 85 km/hr Upstream speed of the boat = 145/5 = 29 km/hr Speed of boat in still water = (85 + 29)/2 = 57 km/hr

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