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      Question

      The speed of a boat in still water is 26 km/hr. If the

      boat covers 75 km in upstream in 5 hours, then find the time taken by the boat to travel 111 km in downstream.
      A 2 hours Correct Answer Incorrect Answer
      B 2.5 hours Correct Answer Incorrect Answer
      C 3 hours Correct Answer Incorrect Answer
      D 3.5 hours Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 75/5 = 15 km/hr Or, 26 – y = 15 Or, y = 26 – 15 = 11 km/hr Therefore, downstream speed of the boat = 26 + 11 = 37 km/hr Required time taken = 111/37 = 3 hours

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