document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=398759>Question 398759</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An empty swimming pool can be filled in 10 hours. When full. the pool can be drained in 19 hours. How long will it take to full the empty pool if drain is left open. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #282463 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=282463\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An empty swimming pool can be filled in 10 hours. When full. the pool can be drained in 19 hours. How long will it take to full the empty pool if drain is left open.\r<BR>\n" );
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document.write( "pipe A ----- 10 hours filling<BR>\n" );
document.write( "so it does 1/10 of job in 1 hour,<BR>\n" );
document.write( "Pipe B ----------- 19 hours draining<BR>\n" );
document.write( "so it does 1/19 of the job in 1 hour.<BR>\n" );
document.write( "..<BR>\n" );
document.write( "1/10 -1/19 is the job done in 1 hour when both are open<BR>\n" );
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document.write( "(19-10)/190= 9/190 of the job <BR>\n" );
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document.write( "so it will take 190/9 hours to fill the pool.<BR>\n" );
document.write( "=21.11 hours<BR>\n" );
document.write( " </SPAN>\n" );
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