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      Question

      A boat can cover 145 km in downstream in 5 hours and 144

      km in upstream in 8 hours. Find the speed of boat in still water.
      A 5.9 km/hr Correct Answer Incorrect Answer
      B 7.9 km/hr Correct Answer Incorrect Answer
      C 6.9 km/hr Correct Answer Incorrect Answer
      D 8.9 km/hr Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Downstream speed of the boat = 145/5 = 29 km/hr upstream speed of the boat = 144/8= 18 km/hr Speed of boat in still water = (29 + 18)/2 = 23.5 km/hr

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