document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=484991>Question 484991</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat, whose speed in still water is 8Km per hour travels 12Km upstream and then 16Km downstream in 8 hours (so that the boat finishes 4Km further downstream from where it started). What is the speed of the current?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #331797 by </B><A HREF=/tutors/aboutme.mpl?userid=emargo19><B>emargo19(101)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=emargo19><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=331797\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 12/(8-n)+16/(8+n)=8<BR>\n" );
document.write( "12(8+n)+16(8-n)=8(64-n2)<BR>\n" );
document.write( "96+12n+128-16n=512-8n2<BR>\n" );
document.write( "8n2-4n-288=0<BR>\n" );
document.write( "2n2-n-72=0\r<BR>\n" );
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document.write( "using the quadratic equation<BR>\n" );
document.write( "n=6.25520607473216 or -5.75520607473216<BR>\n" );
document.write( " Throwing out the negative answer, we get the speed of the current to be 6.25520607473216 mph.. </SPAN>\n" );
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