document.write( "Question 411179: Rachel paddles her canoe upstream on the Econ River for 45 minutes. Coming downstream with the same boat speedtook 30 minutes. If the current river speed is 3 mph, what was her boat speed. \n" ); document.write( "

Algebra.Com's Answer #289015 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
The distance is the same going both ways
\n" ); document.write( "upstream:
\n" ); document.write( " $\"d+=+%28s+-+3%29%2A%283%2F4%29\"$
\n" ); document.write( " $\"d+=+%283%2F4%29%2As+-+9%2F4\"$
\n" ); document.write( "---------------
\n" ); document.write( "downstream:
\n" ); document.write( " $\"d+=+%28s+%2B+3%29%2A%281%2F2%29\"$
\n" ); document.write( " $\"d+=+%281%2F2%29%2As+%2B+3%2F2\"$
\n" ); document.write( "---------------
\n" ); document.write( " $\"%283%2F4%29%2As+-+9%2F4+=+%281%2F2%29%2As+%2B+3%2F2\"$
\n" ); document.write( " $\"%281%2F4%29%2As+=+9%2F4+%2B+6%2F4\"$
\n" ); document.write( " $\"%281%2F4%29%2As+=+15%2F4\"$
\n" ); document.write( " $\"s+=+15\"$
\n" ); document.write( "Her boat speed was 15 mi/hr
\n" ); document.write( "check answer:
\n" ); document.write( " $\"d+=+%2815+-+3%29%2A%283%2F4%29\"$
\n" ); document.write( " $\"d+=+9\"$ mi
\n" ); document.write( " $\"d+=+%28s+%2B+3%29%2A%281%2F2%29\"$
\n" ); document.write( " $\"d+=+%2815+%2B+3%29%2A%281%2F2%29\"$
\n" ); document.write( " $\"d+=+9\"$ mi
\n" ); document.write( "OK \n" ); document.write( "

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