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      Question

      A boat goes 50 km in upstream in 5 hours and takes 4

      hours to complete a distance of 16 km in downstream. Find the speed of boat in still water.
      A 6.2 km/hr Correct Answer Incorrect Answer
      B 7 km/hr Correct Answer Incorrect Answer
      C 10 km/hr Correct Answer Incorrect Answer
      D 6 km/hr Correct Answer Incorrect Answer

      Solution

      Speed of boat in still water = (D + U)/2 Upstream speed (U) = 50/5 = 10 km/hr Downstream speed (D) = 16/4 = 4 km/hr Speed of boat in still water = (10 + 4)/2 = 14/2 = 7 km/hr

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