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      Question

      The speed of a boat in still water is 12 km/h and the

      speed of the stream is 3 km/h. How much time will the boat take to travel 27 km upstream?
      A 2 hrs Correct Answer Incorrect Answer
      B 9 hrs Correct Answer Incorrect Answer
      C 3 hrs Correct Answer Incorrect Answer
      D 7 hrs Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Upstream speed = (speed in still water − speed of stream) = 12 − 3 = 9 km/h Time = Distance ÷ Speed = 27 ÷ 9 = 3 hours 

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