document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=640453>Question 640453</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two pumps working together can fill a water tank in 18 minutes. one pump works twice as fast as the other pump. If each pump worked alone, how long would it take to fill the water tank? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #403285 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=403285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two pumps working together can fill a water tank in 18 minutes. one pump works twice as fast as the other pump. If each pump worked alone, how long would it take to fill the water tank?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=minutes faster pump can fill tank by itself<BR>\n" );
document.write( "Its work rate=1/x<BR>\n" );
document.write( "2x=minutes slower pump can fill tank by itself<BR>\n" );
document.write( "Its work rate=1/2x<BR>\n" );
document.write( "1/18=work rate pumps working together<BR>\n" );
document.write( "..<BR>\n" );
document.write( "sum of individual work rates=work rate when working together<BR>\n" );
document.write( "1/x+1/2x=1/18<BR>\n" );
document.write( "LCD=2x<BR>\n" );
document.write( "2+1=2x/18<BR>\n" );
document.write( "3=x/9<BR>\n" );
document.write( "x=27<BR>\n" );
document.write( "2x=54<BR>\n" );
document.write( "minutes faster pump can fill tank by itself=27<BR>\n" );
document.write( "minutes slower pump can fill tank by itself=54 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );