document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=32149>Question 32149</A>: <I><SPAN STYLE=\"word-break: break-all;\"> David's boat can travel 11 miles downstream in the same amount of time it can travel 9 miles upstream.  If the speed of the boat is 20 miles per hour in still water, find the speed of the current. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #18682 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=18682\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the speed of the current be x:;<BR>\n" );
document.write( "equation:<BR>\n" );
document.write( "11(20-x)=9(20+x)<BR>\n" );
document.write( "220-11x=180+9x<BR>\n" );
document.write( "40=20x<BR>\n" );
document.write( "x=2<BR>\n" );
document.write( "Hence, the speed of the current is 2mph.<BR>\n" );
document.write( "PAul. </SPAN>\n" );
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