document.write( "Question 1092750: Plz help me to do this sum :- The diameter of base of a chimney is 80 CM and hieght is 12.5 m. What will be the cost of painting this chimney from outside at the rate of Rs 140 per square metre? π=3.14
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document.write( "(Plz reply me fast. It's argent.)
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Algebra.Com's Answer #707365 by Theo(13342)![]() ![]() You can put this solution on YOUR website! the diameter is 80 centimeters\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the height is 12.5 meters.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the chimney forms a right cylinder.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the formula for the lateral surface area of a right cylinder is equal to 2 * pi * r * h\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "pi = 3.14. \n" ); document.write( "r = half of the diameter = 40 centimeters. \n" ); document.write( "h = the height which is equal to 12.5 meters.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "one centimeter is equal to .01 meters.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "convert everything to meters to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "pi = 3.14. \n" ); document.write( "r = half of the diameter = .4 meters. \n" ); document.write( "h = the height which is equal to 12.5 meters\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the formula of 2 * pi * r * h for the lateral surface area of the chimney becomes 2 * 3.14 * .4 meters * 12.5 meters.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this results in a lateral surface area of 31.4 square meters.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "at rs 140 per square meter, the cost will be 140 * 31.4 = rs 4396.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |