document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175706>Question 175706</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a water tank has an inlet pipe and a drain pipe. full tank can be emptied in 30 minutes and if the drain is opened and an empty tank can be filled in 45 mins with the inlet pipe opened. if both pipes are accidentally opened when the tank is full, then how long will it take to empty 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 #130894 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=130894\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the tank emptys in 30 minutes, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F30 ALIGN=MIDDLE  ALT=\"1%2F30\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank empties in 1 minute.  Likewise <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F45 ALIGN=MIDDLE  ALT=\"1%2F45\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank fills in 1 minute.  So together:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F30%29+-+%281%2F45%29 ALIGN=MIDDLE  ALT=\"%281%2F30%29+-+%281%2F45%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank empties in 1 minute.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2F90%29+-+%282%2F90%29 ALIGN=MIDDLE  ALT=\"%283%2F90%29+-+%282%2F90%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F90 ALIGN=MIDDLE  ALT=\"1%2F90\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the tank empties in 1 minute, so it takes 90 minutes for the tank to empty. </SPAN>\n" );
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