document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=388849>Question 388849</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pump 1 can empty a tank in 4 hours while Pump 2 can empty the same tank in 3 hours.  How long would it take to empty the tank if both pumps worked together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #275246 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=275246\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Pump 1 can empty a tank in 4 hours while Pump 2 can empty the same tank in 3 hours. How long would it take to empty the tank if both pumps worked together?<BR>\n" );
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document.write( "Pump 1 rate: 1/4 job/hr<BR>\n" );
document.write( "Pump 2 rate: 1/3 job/hr<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Together rate: 1/x job/hr<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/4 + 1/3  = 1/x<BR>\n" );
document.write( "------<BR>\n" );
document.write( "3x + 4x = 12<BR>\n" );
document.write( "7x = 12<BR>\n" );
document.write( "x = 1.714 hrs = 1 hr and 43 minutes<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );