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      Question

      A Motarboat running upstream takes 6 hours and 45

      minutes to cover a distance, while it takes 3 hours to cover the same distance running downstream. Determine the ratio of speed of the Motarboat to speed of water current? 
      A 12/5 Correct Answer Incorrect Answer
      B 13/5 Correct Answer Incorrect Answer
      C 17/5 Correct Answer Incorrect Answer
      D 11/5 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Let, the speed of the Motarboat be‘a’ km/h and speed of the current be‘b’ km/h 6 hour 45 minutes = 27/4 hours According to the question, (a + b) × 3 = (a – b) × 27/4 4a + 4b = 9a – 9b 4b + 9b = 9a – 4a 13b = 5a a/b = 13/5

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