document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=744943>Question 744943</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tree casts a shadow of 30 feet long. At the same time, a vertical rod 21 feet high casts a shadow 9 feet long. How tall is the tree? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #453749 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=453749\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This a similar triangle problem.<BR>\n" );
document.write( "If you consider the two horizontal<BR>\n" );
document.write( "sides (shadows) as a ratio 30/9<BR>\n" );
document.write( "Consider the corresponding vertical sides<BR>\n" );
document.write( "x and 21   \r<BR>\n" );
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document.write( "    30/9 = x/21  Cross multiply\r<BR>\n" );
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document.write( "     9x = 630\r<BR>\n" );
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document.write( "      x = 70\r<BR>\n" );
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document.write( "Therefore the tree is 70 feet high. </SPAN>\n" );
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