document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=66831>Question 66831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sewage treatment plant has two inlet pipes to its settling pond. <BR>\n" );
document.write( "One can fill the pond in 10 hours, the other in 12 hours. If the first <BR>\n" );
document.write( "pipe is open for 5 hours and then the second pipe is opened, how long <BR>\n" );
document.write( "will it take to fill the pond? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #47518 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=47518\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A sewage treatment plant has two inlet pipes to its settling pond. <BR>\n" );
document.write( "One can fill the pond in 10 hours, the other in 12 hours. If the first <BR>\n" );
document.write( "pipe is open for 5 hours and then the second pipe is opened, how long <BR>\n" );
document.write( "will it take to fill the pond?<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "1st pipe DATA:<BR>\n" );
document.write( "Time to fill = 10 hr/job ; Rate = (1/10)job/hr<BR>\n" );
document.write( "If 1st pipe is open 5 hours it completes (1/2) of the job.<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "2nd pipe DATA:<BR>\n" );
document.write( "Time to fill = 12 hr/job ; Rate = (1/12)job/hr<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "Let x be the number of hours the pipes are working to finish filling the tank.<BR>\n" );
document.write( "x(1/10)+1/12)= (1/2) job<BR>\n" );
document.write( "x(22/120)=1/2<BR>\n" );
document.write( "x=120/44<BR>\n" );
document.write( "x=30/11<BR>\n" );
document.write( "x=2.7272... hrs to finish filling the tank. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );