document.write( "Question 987652: A boat traveled downstream a distance of 44 miles and then came right back. If the speed of the current was 5 mph and the total trip took 3 hours and 40 min, find the average speed of the boat relative to the water. \n" ); document.write( "

Algebra.Com's Answer #608383 by josgarithmetic(39618) $\"\"$ $\"About$

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A boat traveled downstream a distance of d miles and then came right back. If the speed of the current was c mph and the total trip took t hours, find the average speed r of the boat relative to the water. \r
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\n" ); document.write( "\n" ); document.write( "RT=D relates speed, time, and distance.\r
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document.write( "                   speed     time    distance\r\n" );
document.write( "DOWNSTREAM         r+c       ()       d\r\n" );
document.write( "UPSTREAM           r-c       ()       d\r\n" );
document.write( "Total                         t\r\n" );
document.write( "\r\n" );
document.write( "                   speed     time       distance\r\n" );
document.write( "DOWNSTREAM         r+c       d/(r+c)      d\r\n" );
document.write( "UPSTREAM           r-c       d/(r-c)      d\r\n" );
document.write( "Total                         t\r\n" );
document.write( "\r\n" );
document.write( "

\n" ); document.write( " $\"d%2F%28r%2Bc%29%2Bd%2F%28r-c%29=t\"$
\n" ); document.write( "Solve for r.\r
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\n" ); document.write( "\n" ); document.write( "Evaluate according to $\"system%28d=44%2Cc=5%2Ct=3%262%2F3%29\"$ . \n" ); document.write( "

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