document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885168>Question 885168</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular field with dimensions of 30 meters by 50 meters is to be surrounded by a fence.  Posts are placed every 2 meters.  a)How many posts are needed.<BR>\n" );
document.write( "b)How many posts are needed if one 50 meter side is not fenced?  c)How many posts are needed if one 30 meter side is not fenced?  <BR>\n" );
document.write( "So I did fine on the first part--I got 80 posts, but then for part b and c I got 55 and 65, but the answer in the back says 56 and 66.  I don't understand why it is one more! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535008 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535008\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) The perimeter of that field (in meters) is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2B50%2B30%2B50=160 ALIGN=MIDDLE  ALT=\"30%2B50%2B30%2B50=160\"   DISABLED_style= \"max-width:90%; height:auto;\" > .<BR>\n" );
document.write( "That is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=160%2F2=80 ALIGN=MIDDLE  ALT=\"160%2F2=80\"   DISABLED_style= \"max-width:90%; height:auto;\" > 2-meter stretches of fencing.<BR>\n" );
document.write( "Each 2-meter stretch of fence starts at 1 post,<BR>\n" );
document.write( "and counting the starting posts is all we need,<BR>\n" );
document.write( "because the post at the end of each 2-meter stretch<BR>\n" );
document.write( "is already counted as the starting post of the next 2-meter piece of fence.<BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2880%29 ALIGN=MIDDLE  ALT=\"highlight%2880%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > posts are needed.<BR>\n" );
document.write( " <BR>\n" );
document.write( "b) If one of the 50-meter sides does not need to be fenced,<BR>\n" );
document.write( "the length of fence you need (in meters) is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2B50%2B30=110 ALIGN=MIDDLE  ALT=\"30%2B50%2B30=110\"   DISABLED_style= \"max-width:90%; height:auto;\" > .<BR>\n" );
document.write( "That will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=110%2F2=55 ALIGN=MIDDLE  ALT=\"110%2F2=55\"   DISABLED_style= \"max-width:90%; height:auto;\" > 2-meter pieces of fence.<BR>\n" );
document.write( "You start at one corner of the side that does not need fence,<BR>\n" );
document.write( "and start installing fence on the 30-meter side that starts from that corner.<BR>\n" );
document.write( "You put one post at that corner: the starting post of the first 2-meter stretch of fence,<BR>\n" );
document.write( "and you keep adding one more post and one more section of fence, all around the 3 sides that need fence.<BR>\n" );
document.write( "When you have installed 55 starting posts and 55 pieces of fence,<BR>\n" );
document.write( "you need one more post at the end of fence section number 55.<BR>\n" );
document.write( "That post is not the starting post of the next section of fence,<BR>\n" );
document.write( "because there is no next section of fence.<BR>\n" );
document.write( "So you need <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=55%2B1=highlight%2856%29 ALIGN=MIDDLE  ALT=\"55%2B1=highlight%2856%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > posts.<BR>\n" );
document.write( " <BR>\n" );
document.write( "c) It is just like part b).<BR>\n" );
document.write( "You need a starting post for each of the 2-meter section of fence,<BR>\n" );
document.write( "and you also need an ending post for the last 2-meter section of fence.<BR>\n" );
document.write( "You need <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50%2B30%2B50=130 ALIGN=MIDDLE  ALT=\"50%2B30%2B50=130\"   DISABLED_style= \"max-width:90%; height:auto;\" > meters of fence.<BR>\n" );
document.write( "That is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=130%2F2=65 ALIGN=MIDDLE  ALT=\"130%2F2=65\"   DISABLED_style= \"max-width:90%; height:auto;\" > 2-meter sections of fence.<BR>\n" );
document.write( "That means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=65 ALIGN=MIDDLE  ALT=\"65\"   DISABLED_style= \"max-width:90%; height:auto;\" > starting posts, one for each of the 65 sections of fence,<BR>\n" );
document.write( "and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > more post at the end of the last section.<BR>\n" );
document.write( "That is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=65%2B1=highlight%2866%29 ALIGN=MIDDLE  ALT=\"65%2B1=highlight%2866%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > posts. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );