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      Question

      Boat β€˜A’ covers 150 km in downstream in 15 hours. If

      the speed of stream is 2 km/hr then find the time taken by boat β€˜A’ to cover 108 km in upstream.
      A 12 hours Correct Answer Incorrect Answer
      B 15 hours Correct Answer Incorrect Answer
      C 18 hours Correct Answer Incorrect Answer
      D 17 hours Correct Answer Incorrect Answer

      Solution

      Downstream speed of boat β€˜A’ = 150/15 = 10 km/hr Speed of boat β€˜A’ in still water = 10 – 2 = 8 km/hr Upstream speed of boat β€˜A’ = 8 – 2 = 6 km/hr Time taken by boat β€˜A’ to cover 108 km in upstream = 108/6 = 18 hours

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