document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=107298>Question 107298</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There is a pool of water.  One Pipe empties the pool in 45 minutes.  The other pipe empties it in 67.5 minutes.  How long would it take to empty the pool if both pipes were used together?\r<BR>\n" );
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document.write( "This is from a worksheet my son brought home. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #78106 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=78106\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the two pipes be labeled pipe A and pipe B, just for convenience.<BR>\n" );
document.write( "First, we'll find the rate that each pipe empties the water from the pool.<BR>\n" );
document.write( "If pipe A can empty the pool in 45 minutes, then it can empty 1/45 of the pool in 1 minute.<BR>\n" );
document.write( "If pipe B can empty the pool in 67.5 minutes, then it can empty 1/67.5 of the pool in 1 minute.<BR>\n" );
document.write( "Now we can find out how much of the pool can be emptied in 1 minute if both pipes are used together. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F45%29+%2B+%281%2F67.5%29+=+%283%2F135%29+%2B+%282%2F135%29 ALIGN=MIDDLE  ALT=\"%281%2F45%29+%2B+%281%2F67.5%29+=+%283%2F135%29+%2B+%282%2F135%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2F135+=+1%2F27 ALIGN=MIDDLE  ALT=\"5%2F135+=+1%2F27\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So with both pipes in use, they can empty 1/27 of the pool in 1 minute.<BR>\n" );
document.write( "So if we multiply 1/27 by 27 we'll find out how many minutes it takes to empty the entire pool.<BR>\n" );
document.write( "1/27 of the pool = 1min.<BR>\n" );
document.write( "The entire pool = 27 mins. </SPAN>\n" );
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