SOLUTION: If a river flows at a rate of 3mph and a boat travels 60 miles upstream and returns in a total time of 9 hours. How fast would the boat travel be traveling in still water?
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Question 107483: If a river flows at a rate of 3mph and a boat travels 60 miles upstream and returns in a total time of 9 hours. How fast would the boat travel be traveling in still water? Answer by scott8148(6628) (Show Source):
You can put this solution on YOUR website! let x="rate in still water" ... t=d/r ... 60/(x-3)+60/(x+3)=9 ... 60(x+3)+60(x-3)=9(x+3)(x-3)
