document.write( "Question 1189181: Two kayakers paddle 18 km downstream with the current in the same time it takes them to go 8 km upstream against the current. The rate of the current is 3 km/hr. What is the rate of the kayakers in still water?\r
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\n" ); document.write( "\n" ); document.write( "Downstream: Distance (km)? Rate (km/hr)? Time (hr)
\n" ); document.write( "Upstream: Distance (km)? Rate (km/hr)? Time (hr)
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Algebra.Com's Answer #820447 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "                   SPEED     TIME                DISTANCE\r\n" );
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document.write( "downstream         r+3       18/(r+3)             18\r\n" );
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document.write( "upstream           r-3        8/(r-3)              8\r\n" );
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\n" ); document.write( "Those times are given as equal.\r
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\n" ); document.write( "\n" ); document.write( "\"18%2F%28r%2B3%29=8%2F%28r-3%29\"
\n" ); document.write( "Solve.\r
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\n" ); document.write( "\n" ); document.write( "\"9%2F%28r%2B3%29=4%2F%28r-3%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"4%28r%2B3%29=9%28r-3%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"4r%2B12=9r-27\"\r
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\n" ); document.write( "\n" ); document.write( "\"12%2B27=5r\"\r
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\n" ); document.write( "\n" ); document.write( "\"r=%2812%2B27%29%2F5\"\r
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\n" ); document.write( "\n" ); document.write( "\"r=39%2F5\"\r
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\n" ); document.write( "\n" ); document.write( "\"r=7%264%2F5\"
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