document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1179939>Question 1179939</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using pipe A, a pool can be filled with water in 4 hours. Pipe B can drain the pool in 8 hours. If both pipes were accidentally open, how long would it take to fill the pool? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #809503 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=809503\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "A fills 1/4 of pool in 1 hour<BR>\n" );
document.write( "B drains 1/8 of pool in 1 hour\r<BR>\n" );
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document.write( "1/4 -1/8 = 1/8 \r<BR>\n" );
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document.write( "Every hour 1/8 of pool is filled<BR>\n" );
document.write( "so it takes 8 hours to fill the pool<BR>\n" );
document.write( " </SPAN>\n" );
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