document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=383598>Question 383598</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an inlet pump can fill a water tower in 15 hours and an outlet pump can empty the tower in 20 hours. if both pumps are left open, how long will it take the tower to fill up? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #271639 by </B><A HREF=/tutors/aboutme.mpl?userid=CharlesG2><B>CharlesG2(834)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CharlesG2><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=271639\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> an inlet pump can fill a water tower in 15 hours and an outlet pump can empty the tower in 20 hours. if both pumps are left open, how long will it take the tower to fill up?\r<BR>\n" );
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document.write( "inlet fills 1/15 tower in an hour<BR>\n" );
document.write( "outlet empties 1/20 tower in an hour<BR>\n" );
document.write( "every hour tower fills 1/15 - 1/20 = 4/60 - 3/60 = 1/60<BR>\n" );
document.write( "so 60 hours to fill tower\r<BR>\n" );
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document.write( " </SPAN>\n" );
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