document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=367239>Question 367239</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 5 mph in still water. In the time it takes to travel 42 miles downstream, it can travel 12 miles upstream. Find the speed of the river.\r<BR>\n" );
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document.write( "I am having some trouble on this, but If I can find an equation or form that i could use then i think that i could solve it. Please let me know asap, I need to finish this by tomorrow. Thank You. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #261790 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=261790\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A boat travels 5 mph in still water. In the time it takes to travel 42 miles downstream, it can travel 12 miles upstream. Find the speed of the river. <BR>\n" );
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document.write( "Downstream DATA:<BR>\n" );
document.write( "distance = 42 miles ; rate = 5+r mph ; time = 42/(r+5) hrs.<BR>\n" );
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document.write( "Upstream DATA:<BR>\n" );
document.write( "distance = 12 miles; rate = 5-r mph ; time = 12/(5-r) hrs.<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "time = time<BR>\n" );
document.write( "42/(5+r) = 12/(5-r)<BR>\n" );
document.write( "220-42r = 60+12r<BR>\n" );
document.write( "54r = 160<BR>\n" );
document.write( "r = 2.96 mph (speed of the river)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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