document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189434>Question 1189434</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Brooke’s empty tub fills in 20 mins with the drain plugged, and her full tub drains in 10 mins with the water off. How many minutes would it take the full tub to drain while the water is on? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820813 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=820813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The solution from the other tutor is fine, but it seems like a lot of work....<br><BR>\n" );
document.write( "Using the standard method for solving a problem like this -- by looking at the fractions of the \"job\" each \"worker\" does in 1 minutes -- is much easier.<br><BR>\n" );
document.write( "In 1 minute, the faucet fills 1/20 of the tub; in 1 minute the drain empties 1/10 of the tub.<br><BR>\n" );
document.write( "So in 1 minute the fraction of the tub that is emptied is 1/10-1/20 = 1/20.<br><BR>\n" );
document.write( "Therefore it will take 20 minutes for the whole tub to empty.<br><BR>\n" );
document.write( "ANSWER: 20 minutes<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );