document.write( "Question 1017321: Julie and Eric row their boat (at constant speed ) 40 miles downstream for 4 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 10 hours. Find the rate of the current. \n" ); document.write( "

Algebra.Com's Answer #633623 by josgarithmetic(39625) $\"\"$ $\"About$

You can put this solution on YOUR website!
RT=D travel rates rule\r
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document.write( "                   rate       time        distance\r\n" );
document.write( "Down               40+c        4           d\r\n" );
document.write( "Up                 40-c        10          d\r\n" );
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\r
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\n" ); document.write( "\n" ); document.write( "RT=D
\n" ); document.write( "R=D/T
\n" ); document.write( " $\"system%2840%2Bc=d%2F4%2C40-c=d%2F10%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "OR much simpler, $\"%2840%2Bc%29%2A4=%2840-c%29%2A10\"$ .
\n" ); document.write( "Solve this for c. \n" ); document.write( "

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