document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=477134>Question 477134</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If one person can fill a pool in 30min another in 45min and another in 90min how long would it take if they all work together. i know the answer is 15 but i dont know the equation used to get the answer. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #327080 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=327080\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If one person can fill a pool in 30min another in 45min and another in 90min how long would it take if they all work together. i know the answer is 15 but i dont know the equation used to get the answer.<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate + rate = together rate<BR>\n" );
document.write( "1/30 + 1/45 + 1/90 = 1/x<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Multiply thru by 90x to get:<BR>\n" );
document.write( "3x + 2x + x = 90<BR>\n" );
document.write( "6x = 90<BR>\n" );
document.write( "x = 15 minutes<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );