document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=171652>Question 171652</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An oil tank at a refinery has two inlet pipes and one outlet pipe. One inlet pipe can fill the tank in 6h, and the other inlet pipe can fill the tank in 12h. The outlet pipe can empty the tank in 24h. How long would it take to fill the tank with all three pipes open?<BR>\n" );
document.write( "Please, hep me with this problem, i'm trying since friday to solve it =( Tank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #126790 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=126790\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An oil tank at a refinery has two inlet pipes and one outlet pipe. One inlet pipe can fill the tank in 6h, and the other inlet pipe can fill the tank in 12h. The outlet pipe can empty the tank in 24h. How long would it take to fill the tank with all three pipes open?<BR>\n" );
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document.write( "Let the full tank = 1; + for filling, - for draining<BR>\n" );
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document.write( "Let t = time required when all three pipes are open:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F6 ALIGN=MIDDLE  ALT=\"t%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F12 ALIGN=MIDDLE  ALT=\"t%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F24 ALIGN=MIDDLE  ALT=\"t%2F24\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "Multiply equation by 24 to get rid of the denominators, results:<BR>\n" );
document.write( "4t + 2t - t = 24<BR>\n" );
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document.write( "5t = 24<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=24%2F5 ALIGN=MIDDLE  ALT=\"24%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 4.8 hrs to fill when all pipes are open<BR>\n" );
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document.write( "Check solution using a calc:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.8%2F6 ALIGN=MIDDLE  ALT=\"4.8%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.8%2F12 ALIGN=MIDDLE  ALT=\"4.8%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.8%2F24 ALIGN=MIDDLE  ALT=\"4.8%2F24\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".8 + .4 - .2 = 1<BR>\n" );
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document.write( "Not that hard, right?<BR>\n" );
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