document.write( "Question 271646: the diameter of a circular glass frame is 84cm. a 2cm wide metallic border is outside it. find the cost of metal required for bordering the glass frame at Rs.30 per square cm. \n" ); document.write( "

Algebra.Com's Answer #198823 by mananth(16946) $\"\"$ $\"About$

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the diameter of a circular glass frame is 84cm. a 2cm wide metallic border is outside it. find the cost of metal required for bordering the glass frame at Rs.30 per square cm.\r
\n" ); document.write( "\n" ); document.write( "There are two steps to solve this problem\r
\n" ); document.write( "\n" ); document.write( "find the area of the glass with 2 cm border\r
\n" ); document.write( "\n" ); document.write( "find the area of the glass\r
\n" ); document.write( "\n" ); document.write( "Subtract the two to get area of the metal portion\r
\n" ); document.write( "\n" ); document.write( "Diameter of glass with border = 86 cm\r
\n" ); document.write( "\n" ); document.write( "Area = pi*(d^2/4)
\n" ); document.write( " =3.14 *86*86 / 4\r
\n" ); document.write( "\n" ); document.write( "5805.86sq. cms.\r
\n" ); document.write( "\n" ); document.write( "Diameter of glass is 84 cms
\n" ); document.write( "Area of glass is
\n" ); document.write( "Area = pi*(d^2/4)
\n" ); document.write( " =3.14 *84*84 / 4
\n" ); document.write( "= 5538.96\r
\n" ); document.write( "\n" ); document.write( "5805.86- 5538.96 = 266.9sq. cms is the area of the metal.\r
\n" ); document.write( "\n" ); document.write( "The cost will be 266.9* 30 = Rs. 8007\r
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