document.write( "Question 630957: Joe's boat can travel 15 miles upstream and 15 miles downstream in a total of 4 hours. If the speed of the current is 5 mph, what is the speed of boat in still water? \r
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Algebra.Com's Answer #397238 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
R*t=d
\n" ); document.write( "(r+ c)*(t)=15;
\n" ); document.write( "(r-c)*(4-t)=15;
\n" ); document.write( "c=5, r = 10, t = 1
\n" ); document.write( "time equals one hour with current
\n" ); document.write( "three hours against current
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\n" ); document.write( "15*1=15
\n" ); document.write( "5*3=15
\n" ); document.write( "ok\r
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