document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=342933>Question 342933</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An old pump can drain a pool in 6 hours working alone. A new pump can drain the pool in 4 hours working alone. How long will it take both pumps to empty the pool working together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #245433 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=245433\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An old pump can drain a pool in 6 hours working alone. A new pump can drain the pool in 4 hours working alone. How long will it take both pumps to empty the pool working together?<BR>\n" );
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document.write( "Old pump rate = 1/6 job/hr<BR>\n" );
document.write( "----<BR>\n" );
document.write( "New pump rate = 1/4 job/hr<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Together rate = 1/x job/hr<BR>\n" );
document.write( "---------------------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "1/6 + 1/4 = 1/x<BR>\n" );
document.write( "2x + 3x = 12<BR>\n" );
document.write( "5x = 12<BR>\n" );
document.write( "x = 2.4 hrs. = 2 hrs and 24 minutes (time need to drain the pool together)<BR>\n" );
document.write( "==========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );