document.write( "Question 1074979: Marie and Marco are paddling a canoe together. In still water, the pair moves at a speed of 7km/h. Taking a trip along the river, it takes the pair 2 hours to go 3km up a river and 3km back down. What is the speed of the current in the river? Round to the nearest tenth of a km/h.
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Algebra.Com's Answer #689648 by josgarithmetic(39620) $\"\"$ $\"About$

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( "UP             7-c          3/(7-c)     3    \r\n" );
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document.write( "DOWN           7+c          3/(7+c)     3\r\n" );
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document.write( "Total                         2\r\n" );
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\n" ); document.write( "\n" ); document.write( "Sum of the times
\n" ); document.write( " $\"3%2F%287-c%29%2B3%2F%287%2Bc%29=2\"$ \r
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\n" ); document.write( "\n" ); document.write( "Solve for c.\r
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\n" ); document.write( "\n" ); document.write( " $\"c=2sqrt%287%29\"$ \n" ); document.write( "

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