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      Question

      The speed of current is 25 km/hr. If the speed of the

      boat in still water had been 12 km/hr more than the original speed then it would take 5.5 hours to cover 286 km in downstream. Find the original speed of the boat in still water (in km/h).
      A 10 Correct Answer Incorrect Answer
      B 12 Correct Answer Incorrect Answer
      C 15 Correct Answer Incorrect Answer
      D 14 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the speed of the boat in still water be β€˜x’ km/hr According to the question, (x + 12 + 25) = 286/5.5 Or, x = 52 – 37 = 15

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