document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=578599>Question 578599</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tank can be filled in 18 hours by pipe A alone and in 22 hours by pipe B alone.  How long will it take to fill the tank if both pipes are working? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #370695 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=370695\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Filling	the	pool	is one job<BR>\n" );
document.write( "Pipe I	18	hours	<BR>\n" );
document.write( "It does	  1/18	of the job in 1	hour<BR>\n" );
document.write( "Pipe II	22	hours	<BR>\n" );
document.write( "It does	  1/22	of thejob in 1	hour \r<BR>\n" );
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document.write( "together they will do 1/18  + 1/22 of the job in 1 hour\r<BR>\n" );
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document.write( "Take the LCD\r<BR>\n" );
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document.write( "(22+18)/22*18\r<BR>\n" );
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document.write( "40/396\r<BR>\n" );
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document.write( "=10/99 of the job they complete in 1 hour\r<BR>\n" );
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document.write( "so they will take 99/10 hours\r<BR>\n" );
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document.write( "= 9.9 hours\r<BR>\n" );
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document.write( "OR 9 hours & 54 minutes  ( 0.9 *60 = 54) </SPAN>\n" );
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