document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=329310>Question 329310</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A water tank has an inlet pipe and a drain<BR>\n" );
document.write( "pipe. A full tank can be emptied in 30 minutes if the drain<BR>\n" );
document.write( "is opened and an empty tank can be filled in 45 minutes<BR>\n" );
document.write( "with the inlet pipe opened. If both pipes are accidentally<BR>\n" );
document.write( "opened when the tank is full, then how long will it take to<BR>\n" );
document.write( "empty the tank? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236007 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=236007\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A water tank has an inlet pipe and a drain pipe. <BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "A full tank can be emptied in 30 minutes if the drain<BR>\n" );
document.write( "is opened and an empty tank can be filled in 45 minutes<BR>\n" );
document.write( "with the inlet pipe opened. <BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Emptying Pipe DATA:<BR>\n" );
document.write( "time = 1/2 hr/job ; rate = 2 jobs/hr<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "Fill tank DATA:<BR>\n" );
document.write( "time = 3/4 hr/job ; rate = 4/3 job/hr<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "If both pipes are accidentally<BR>\n" );
document.write( "opened when the tank is full, then how long <BR>\n" );
document.write( "will it take to empty the tank?\r<BR>\n" );
document.write( "\n" );
document.write( "Together DATA:<BR>\n" );
document.write( "time = x hrs/job ; rate = 1/x job/hr.<BR>\n" );
document.write( "======================================<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "Empty rate - Fill rate = together rate<BR>\n" );
document.write( "2 - (4/3) = 1/x<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru by 3x to get:<BR>\n" );
document.write( "6x-4x = 3<BR>\n" );
document.write( "2x = 3<BR>\n" );
document.write( "x = 3/2 hrs<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );