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      Question

      A boat travels 600 metres against the stream in 20

      seconds and returns the same distance with the stream in 15 seconds. Determine the speed of the boat in still water.
      A 35 m/s Correct Answer Incorrect Answer
      B 25 m/s Correct Answer Incorrect Answer
      C 19 m/s Correct Answer Incorrect Answer
      D 45 m/s Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Speed of boat in upstream = (600 / 20) = 30 m/s

      Speed of boat in downstream = (600 / 15) = 40 m/s

      Speed of the boat in still water = [(30 + 40) / 2] = 35 m/s

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