document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1012292>Question 1012292</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tree casts a shadow that is 15 feet long. At the same time, a building casts a shadow that is 21 feet long. If the building is 16 feet taller than the tree, how tall is the building?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #628193 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=628193\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let us call the height of the tree, x.<BR>\n" );
document.write( "Then we can write the proportion<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2Fx+=+21%2F%28x%2B16%29 ALIGN=MIDDLE  ALT=\"15%2Fx+=+21%2F%28x%2B16%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now cross multiply and get<BR>\n" );
document.write( "21x = 15(x+16)<BR>\n" );
document.write( "21x = 15x + 240<BR>\n" );
document.write( "6x = 240<BR>\n" );
document.write( "x = 40 feet<BR>\n" );
document.write( "The building is x + 16, or 56 feet tall.\r<BR>\n" );
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