document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=674942>Question 674942</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two pipes are used to fill the water for the swimming pool in the park. Pipe A can fill the pool in 5 hours B can fill it in 4 hours. If A is turned on and B is turned on 30 minutes later then how long will 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 #419485 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=419485\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How much of the pool is filled by<BR>\n" );
document.write( "pipe A in 1/2 hr ?<BR>\n" );
document.write( "( 1 pool /5 hrs ) x ( 1/2 ) = 1/10 of a pool<BR>\n" );
document.write( "There is now 9/10 of the pool left to fill<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the time to fill 9/10 of the pool<BR>\n" );
document.write( "Used together, the rates of A and B add<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F5+%2B+1%2F4+=+%289%2F10%29+%2F+t+ ALIGN=MIDDLE  ALT=\"+1%2F5+%2B+1%2F4+=+%289%2F10%29+%2F+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+20t+ ALIGN=MIDDLE  ALT=\"+20t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t+%2B+5t+=+18+ ALIGN=MIDDLE  ALT=\"+4t+%2B+5t+=+18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9t+=+18+ ALIGN=MIDDLE  ALT=\"+9t+=+18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2+ ALIGN=MIDDLE  ALT=\"+t+=+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The total time to fill the pool is 2 and 1/2 hrs<BR>\n" );
document.write( "When A and B are filling together, they take 2 hrs to finish<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );