document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=380404>Question 380404</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2 pipes are connected to a tank.  On pipe fills the tank in 7 hours.  The second pipe empties the tank in 9 hours.  If both pipes are open, how long will it take to fill the tank? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #269974 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=269974\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the hourly rate of each event.<BR>\n" );
document.write( "If the first pipe can fill the tank in 7 hours, then it can fill (+) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F7 ALIGN=MIDDLE  ALT=\"1%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank in 1 hour.<BR>\n" );
document.write( "If the second pipe can empty the tank in 9 hours, then it can empty (-) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F9 ALIGN=MIDDLE  ALT=\"1%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank in 1 hour.<BR>\n" );
document.write( "Putting these two events together, we get:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F7+-+1%2F9+=+2%2F63 ALIGN=MIDDLE  ALT=\"1%2F7+-+1%2F9+=+2%2F63\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F63 ALIGN=MIDDLE  ALT=\"2%2F63\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank is filled in 1 hour.<BR>\n" );
document.write( "It takes <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=63%2F2 ALIGN=MIDDLE  ALT=\"63%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours to fill the tank.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=63%2F2+=+31 ALIGN=MIDDLE  ALT=\"63%2F2+=+31\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F2 ALIGN=MIDDLE  ALT=\"1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >hours. </SPAN>\n" );
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