document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=41448>Question 41448</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A semicircle is folded to form a right circular cone so that its original base which measures 5 cm becomes the circumference of the cone base.  Find :-<BR>\n" );
document.write( "a)The diameter of the base<BR>\n" );
document.write( "b)The curved surface area of the cone\r<BR>\n" );
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document.write( "This is what I have done\r<BR>\n" );
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document.write( "a)Diameter of the cone now = original base/2 = 5/2 = 2.5\r<BR>\n" );
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document.write( "b)Since the new diameter = 2.5 thus radius = diameter/2 = 2.5/2 = 1.25<BR>\n" );
document.write( "Slant height = radius (is it correct ?)<BR>\n" );
document.write( "Curved surface are of the cone <BR>\n" );
document.write( "= PI r l (r = radius and l = slant length)<BR>\n" );
document.write( "= 3.142 x 1.25 x 1.25<BR>\n" );
document.write( "= 4.909375<BR>\n" );
document.write( "= 4.9 </SPAN>\n" );
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document.write( "A semicircle is folded to form a right circular cone so that its original base which measures 5 cm becomes the circumference of the cone base. Find :-<BR>\n" );
document.write( "a)The diameter of the base<BR>\n" );
document.write( "b)The curved surface area of the cone<BR>\n" );
document.write( "This is what I have done<BR>\n" );
document.write( "a)Diameter of the cone now = original base/2 = 5/2 = 2.5...NO..<BR>\n" );
document.write( "CIRCUMFERENCE OF SEMICIRCLE =5 = CIRCUMFERENCE OF CONE BOTTOM=PI*DCONE<BR>\n" );
document.write( "SO DCONE=5/PI....RCONE=5/2PI<BR>\n" );
document.write( "L= SLANT HEIGHT OF CONE = RADIUS OF ORIGINAL SEMICIRCLE=5/PI...(PERIMETER OF SEMICIRCLE=PI*R)<BR>\n" );
document.write( "CSA OF CONE=PI*R*L=PI*(5/2PI)*(5/PI)=25/2PI=3.98\r<BR>\n" );
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document.write( "b)Since the new diameter = 2.5 thus radius = diameter/2 = 2.5/2 = 1.25<BR>\n" );
document.write( "Slant height = radius (is it correct ?)<BR>\n" );
document.write( "Curved surface are of the cone<BR>\n" );
document.write( "= PI r l (r = radius and l = slant length)<BR>\n" );
document.write( "= 3.142 x 1.25 x 1.25<BR>\n" );
document.write( "= 4.909375<BR>\n" );
document.write( "= 4.9 </SPAN>\n" );
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