document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=454684>Question 454684</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an efficient heater can warm the entire gym in 3 h.  an older , less efficient heater requires 8 h to heat the same space.  how long would it take to heat the gymnasium if both heaters worked together? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #312173 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=312173\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> an efficient heater can warm the entire gym in 3 h. <BR>\n" );
document.write( "an older , less efficient heater requires 8 h to heat the same space. <BR>\n" );
document.write( "how long would it take to heat the gymnasium if both heaters worked together?<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "efficient heater rate = 1/3 job/hr<BR>\n" );
document.write( "older heater rate = 1/8 job/hr<BR>\n" );
document.write( "together heater rate = 1/x job/hr<BR>\n" );
document.write( "=====================================<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/3 + 1/8 = 1/x<BR>\n" );
document.write( "8x + 3x = 24<BR>\n" );
document.write( "11x = 24<BR>\n" );
document.write( "x = 24/11 = 2 2/11 hrs = 2hr 11 minutes<BR>\n" );
document.write( "===========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );