SOLUTION: a paddle boat travels 9 miles upstream (against the current) in the same time it travels 15 miles downstream (with the current) . if the current of the river is 3 mph determine th

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Question 1037889: a paddle boat travels 9 miles upstream (against the current) in the same time it travels 15 miles downstream (with the current) . if the current of the river is 3 mph determine the speed of the boat in still water
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Let r be the boat's rate in still water. Then:
9/r-3=15/r+3
15r-45=9r+27
6r=72
r=12 mph!!!!!!!!!!!!!!!!!