SOLUTION: A River runs 4 miles an hour. If a boat traveled 52 miles down stream and in the same time 21 miles up stream,what is the boats speed in still water?
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Question 49581: A River runs 4 miles an hour. If a boat traveled 52 miles down stream and in the same time 21 miles up stream,what is the boats speed in still water?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
52/(X+4)=21/(X-4) OR 52X-208=21X+84 OR 31X=292 OR X=292/31 or x=9.4 mph. is the speed of the boat in still water.
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