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      Question

      The speed of the stream is 10 km/h. Boat β€˜A’ covers

      88 km distance against the stream in 11 hours and boat β€˜B’ covers 106 km distance against the stream in 2 hours. The speed of boat β€˜B’ in still water is how much percent of the speed of boat β€˜A’ in still water?
      A 350% Correct Answer Incorrect Answer
      B 300% Correct Answer Incorrect Answer
      C 320% Correct Answer Incorrect Answer
      D 370% Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Speed of boat β€˜A’ upstream = 88/11 = 8 km/h Speed of boat β€˜B’ upstream = 106/2 = 53 km/h Speed of the boat β€˜A’ in still water = 8 + 10 = 18 km/h Speed of the boat β€˜B’ in still water = 53 + 10 = 63 km/h Required percentage = (63/18) Γ— 100 = 350%

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