document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1203960>Question 1203960</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a certain spider web, the lengths of the shortest and longest threads are 3.4mm and 50.2mm respectively. The successive equally spaced threads are 1.2mm apart. If the length of the cross threads form an Arithmetic Progression (A.P), find the number of cross threads. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #839901 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=839901\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "In a certain spider web, the lengths of the shortest and longest threads are 3.4mm and 50.2mm respectively. The successive equally spaced threads are 1.2mm apart. If the length of the cross threads form an Arithmetic Progression (A.P), find the number of cross threads.\r<BR>\n" );
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document.write( " Length of the shortest  thread are 3.4mm\r<BR>\n" );
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document.write( "Length of the longest  thread are 50.2mm\r<BR>\n" );
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document.write( "The successive equally spaced threads are 1.2mm apart\r<BR>\n" );
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document.write( " length of the cross threads form an Arithmetic Progression\r<BR>\n" );
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document.write( "Here a 3.4 , tn = 50.2  d= 1.2\r<BR>\n" );
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document.write( "tn = a+(n-1)*d\r<BR>\n" );
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document.write( "50.2= 3.4+ (n-1)* 1.2\r<BR>\n" );
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document.write( "50.2 - 3.4 = (n-1)*1.2\r<BR>\n" );
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document.write( "46.8= (n-1) *1.2\r<BR>\n" );
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document.write( "46.8/1.2= n-1\r<BR>\n" );
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document.write( "39 = n-1\r<BR>\n" );
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document.write( "n=40\r<BR>\n" );
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document.write( " The number of cross threads =40\r<BR>\n" );
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document.write( " </SPAN>\n" );
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