document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=968661>Question 968661</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sink has two faucets: one for hot water and one for cold water. The sink can be filled by a cold water faucet in 3.9 minutes. If both faucets are open, the sink is filled in 3 minutes. How long does it take to fill the sink with just the hot water faucet open? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #591892 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=591892\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of filling to get rate<BR>\n" );
document.write( "of filling together<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in minutes for <BR>\n" );
document.write( "the hot water faucet to fill sink<BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "Rate for hot water faucet:<BR>\n" );
document.write( "[ 1 sink filled ] / [ t min ]<BR>\n" );
document.write( "Rate for cold water faucet:<BR>\n" );
document.write( "[ 1 sink filled ] / [ 3.9 min ]<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2Ft+%2B+1%2F3.9+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2Ft+%2B+1%2F3.9+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2A3.9%2At+ ALIGN=MIDDLE  ALT=\"+3%2A3.9%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2A3.9+%2B+3t+=+3.9t+ ALIGN=MIDDLE  ALT=\"+3%2A3.9+%2B+3t+=+3.9t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11.7++=+.9t+ ALIGN=MIDDLE  ALT=\"+11.7++=+.9t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+13+ ALIGN=MIDDLE  ALT=\"+t+=+13+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It takes 13 minutes for <BR>\n" );
document.write( "the hot water faucet to fill sink </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );