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      Question

      A boat goes 24 km upstream in 3 hours and 42 km

      downstream in 3 hours. Find the speed of the boat in still water.
      A 15 km/h Correct Answer Incorrect Answer
      B 11 km/h Correct Answer Incorrect Answer
      C 17 km/h Correct Answer Incorrect Answer
      D 23 km/h Correct Answer Incorrect Answer

      Solution

      ATQ, Upstream speed = 24/3 = 8 km/h Downstream speed = 42/3 = 14 km/h Speed in still water = (8 + 14)/2 = 11 km/h

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