document.write( "Question 1066481: A boat traveled downstream a distance of 85 mi and then came right back. If the speed of the current was 8 mph and the total trip took 5 hours and 40 minutes, find the average speed of the boat relative to the water. \n" ); document.write( "
Algebra.Com's Answer #681675 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "         SPEED        TIME              DISTANCE\r\n" );
document.write( "\r\n" );
document.write( "DOWN        r+8       \"85%2F%28r%2B8%29\"             85\r\n" );
document.write( "\r\n" );
document.write( "UP          r-8       \"85%2F%28r-8%29\"             85\r\n" );
document.write( "\r\n" );
document.write( "Total                \"5%262%2F3\"\r\n" );
document.write( "
\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"85%2F%28r%2B8%29%2B85%2F%28r-8%29=5%262%2F3\"
\n" ); document.write( "Solve this for r.
\n" ); document.write( "
\n" );