document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=622108>Question 622108</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A lake is being emptied at a rate that will leave it empty after 16 weeks, while being filled by a river that will fill it in 25 weeks.  How long will it take to empty the lake? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #391122 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=391122\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A lake is being emptied at a rate that will leave it empty after 16 weeks, while being filled by a river that will fill it in 25 weeks.  How long will it take to empty the lake?<BR>\n" );
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document.write( "Assuming it starts at full:<BR>\n" );
document.write( "It loses 1/16 of its volume per week<BR>\n" );
document.write( "It gains 1/25 per week<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "1/25 - 1/16 = -9/400 of its volume change per week<BR>\n" );
document.write( "--> 400/9 weeks<BR>\n" );
document.write( " </SPAN>\n" );
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