document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=310564>Question 310564</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the length of the diagonal of a regular cube with a surface area of 54 units squared? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222071 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222071\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> surface area of cube = 54 \r<BR>\n" );
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document.write( "let the  side be x<BR>\n" );
document.write( "x^2 is the area of one face of the cube.<BR>\n" );
document.write( "there are 6 faces.<BR>\n" );
document.write( "6x^2 = 54<BR>\n" );
document.write( "x^2= 54/6<BR>\n" );
document.write( "x^2=9<BR>\n" );
document.write( "x=3 units\r<BR>\n" );
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document.write( "apply pythagoras theorem to find the diagonal.\r<BR>\n" );
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document.write( "3^2 +3^2 = diagonal^2\r<BR>\n" );
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document.write( "9+9= diagonal ^2<BR>\n" );
document.write( "diagonal = sqrt18<BR>\n" );
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