document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=980441>Question 980441</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The load that can supported by a rectangular beam varies jointly as the width of the beam and the square of its height, and inversely as the length of the beam. A beam 12 feet long, with a width of 6 inches and a height of 4 inches can support a maxiumum load of 800 pounds. If a similar board has a width of 9 inches and a height of 5 inches, how long must it be to support 1,200 pounds? <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #601579 by </B><A HREF=/tutors/aboutme.mpl?userid=onlinepsa><B>onlinepsa(22)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=onlinepsa><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=onlinepsa><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=601579\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Load supported can be expressed as,\r<BR>\n" );
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document.write( "L= k* (h^2) * w / l\r<BR>\n" );
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document.write( "In first case:\r<BR>\n" );
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document.write( "800 = k* (4^2) * 6/144\r<BR>\n" );
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document.write( "k= 1200\r<BR>\n" );
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document.write( "In the second case:\r<BR>\n" );
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document.write( "1200 = 1200* (5^2) * 9/l\r<BR>\n" );
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document.write( "=> l = 25 * 9 = 225 inch = 18.7 feet approx.\r<BR>\n" );
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document.write( "Thanks,<BR>\n" );
document.write( "PRD<BR>\n" );
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