SOLUTION: in testing the rate at which a polluted stream flows, a boat that travels at 5.5 mi/h in still water took 5.0 h to go downstream between two points, and it took 8.0 h to go upstrea

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Question 920309: in testing the rate at which a polluted stream flows, a boat that travels at 5.5 mi/h in still water took 5.0 h to go downstream between two points, and it took 8.0 h to go upstream between the same two points. what is th rate of the flow of the stream?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
c, flow rate of the river

RT=D basic rule for uniform rates of travel

%285.5%2Bc%29%2A5=d and %285.5-c%29%2A8=d.

%285.5%2Bc%295=%285.5-c%298
27.5%2B5c=44-8c
13c=44-27.5
highlight%28c=1.27%29