document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=54953>Question 54953</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Speed:  A boat travels 36 miles down a river in 3 hours.  If it takes the boat 9 hours to travel the same distance going up the river, what is the speed of the boat? What is the speed of the current of the river? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #37128 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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/cgi-bin/show-face.mpl?user=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=37128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = speed of the boat in still water<BR>\n" );
document.write( "y = speed of the current of the river\r<BR>\n" );
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document.write( "x+y = rate downstream<BR>\n" );
document.write( "x-y = rate upstream\r<BR>\n" );
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document.write( "Distance = Rate * Time, so <BR>\n" );
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document.write( "x+y=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=36%2F3 ALIGN=MIDDLE  ALT=\"36%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >=12  Downstream<BR>\n" );
document.write( "x-y=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=36%2F9 ALIGN=MIDDLE  ALT=\"36%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" >=4  Upstream\r<BR>\n" );
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document.write( "Add these two equations together:<BR>\n" );
document.write( "2x = 16, so x = 8 mph in still water\r<BR>\n" );
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document.write( "x+y = 12, where x = 8, y = 4 mph current.\r<BR>\n" );
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document.write( "R^2 at SCC </SPAN>\n" );
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