document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=522879>Question 522879</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a certain sum of money doubles itself at simple interest in 8 years. in how many years will it be three times at the same rate? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #347130 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=347130\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> principal =x<BR>\n" );
document.write( "Interest =x\r<BR>\n" );
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document.write( "x= x*8*r/100<BR>\n" );
document.write( "r=100/8<BR>\n" );
document.write( "--------------=\r<BR>\n" );
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document.write( "2x= x*n*100/8 *1/100<BR>\n" );
document.write( "2=100n/800\r<BR>\n" );
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document.write( "1600=100n<BR>\n" );
document.write( "n= 16 years\r<BR>\n" );
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document.write( " </SPAN>\n" );
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