document.write( "Question 137267: write the equation for:\r
\n" ); document.write( "\n" ); document.write( "on a canoe trip, Rita paddled upstream (against the current) at an average speed of 2 mi/h relative to the riverbank. On the return trip downstream (with the current), her average speed was 3 mi/h. Find Rita's paddling speed in still water and the speed of the river's current. \n" ); document.write( "

Algebra.Com's Answer #100470 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Rita paddled upstream (against the current) at an average speed of 2 mi/h relative to the riverbank. On the return trip downstream (with the current), her average speed was 3 mi/h. Find Rita's paddling speed in still water and the speed of the river's current.
\n" ); document.write( ":
\n" ); document.write( "Let s = speed in still water.
\n" ); document.write( "Let c = speed of the current
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each trip
\n" ); document.write( "s - c = 2; upstream
\n" ); document.write( "s + c = 3; downstream
\n" ); document.write( "-------------adding eliminates c
\n" ); document.write( "2s = 5
\n" ); document.write( "s = $\"5%2F2\"$
\n" ); document.write( "s = 2.5 mph in still water
\n" ); document.write( ":
\n" ); document.write( "c = 3 - 2.5
\n" ); document.write( "c = .5 mph speed of the current
\n" ); document.write( ";
\n" ); document.write( "Check in the upstream equation : 2.5 - .5 = 2 mph \n" ); document.write( "

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