document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1149117>Question 1149117</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 80 coins are placed in a line on the ground. The distance between any two consecutive coins is 10 metres. How far must a person travel to bring them, one by one, to a basket placed 10 metres behind the first coin.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #770475 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=770475\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "1st coin: 10m to the coin and 10m back to the basket = 20m<BR>\n" );
document.write( "2nd coin: 20m to the coin and 20m back to the basket = 40m<BR>\n" );
document.write( "3rd coin: 30m to the coin and 30m back to the basket = 60m<BR>\n" );
document.write( "...<BR>\n" );
document.write( "80th coin: 800m to the coin and 800m back to the basket = 1600m<br><BR>\n" );
document.write( "Total distance: (20+40+60+...+1600)m<br><BR>\n" );
document.write( "Use the formula for the sum of an arithmetic sequence:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+=+n%28%28a1%2Ban%29%2F2%29+=+80%28%2820%2B1600%29%2F2%29+=+80%28810%29+=64800 ALIGN=MIDDLE  ALT=\"S+=+n%28%28a1%2Ban%29%2F2%29+=+80%28%2820%2B1600%29%2F2%29+=+80%28810%29+=64800\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER: 64,800 meters<br>\r<BR>\n" );
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