document.write( "Question 1183328: If the height of a right circular cone is decreased by 8 percent by what percent must the radius of the base be decreased so that the volume of the cone is decreased by 15 percent? \n" ); document.write( "
Algebra.Com's Answer #813584 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
If the height of a right circular cone is decreased by 8 percent by what percent must the radius of the base be decreased so that the volume of the cone is decreased by 15 percent?
\n" ); document.write( ":
\n" ); document.write( "8% reduction = .92h
\n" ); document.write( "15% reduction = .85v
\n" ); document.write( "let a = reduced amt multiplier time the radius \r
\n" ); document.write( "\n" ); document.write( "\"1%2F3\"\"pi%2A%28ar%29%5E2%2A.92h\" = .85(\"1%2F3\"\"pi%2Ar%5E2%2Ah\")
\n" ); document.write( "multiply both sides by 3
\n" ); document.write( "\"pi%2A%28a%5E2r%5E2%29%2A.92h\" = .85(\"pi%2Ar%5E2%2Ah\")
\n" ); document.write( "divide both side by pi*r^2*h
\n" ); document.write( "\"a%5E2%2A.92+=+.85\"
\n" ); document.write( "\"a%5E2+=+.85%2F.92\"
\n" ); document.write( "a = \"sqrt%28.924%29\"
\n" ); document.write( "a = .9612 times the radius, therefore
\n" ); document.write( "Radius has to be reduced by 3.88%\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );