document.write( "Question 940367: A manufacturer of food-storage containers makes a cylindrical bin with a volume of 1000cm. What dimensions (height and radius) will minimize the material needed to produce each bin, that is minimize the surface area?\r
\n" ); document.write( "\n" ); document.write( "1000 = Pai r^2 h
\n" ); document.write( ".........
\n" ); document.write( "

Algebra.Com's Answer #573132 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
The volume of the can is,
\n" ); document.write( "\"V=pi%2AR%5E2%2AH=1000\"
\n" ); document.write( "The surface area of the can is,
\n" ); document.write( "\"A=2pi%2AR%5E2%2B2pi%2AR%2AH\"
\n" ); document.write( "From the volume equation,
\n" ); document.write( "\"H=1000%2F%28piR%5E2%29\"
\n" ); document.write( "Substitute into the surface area equation,
\n" ); document.write( "\"A=2pi%2AR%5E2%2B2pi%2AR%281000%2Fpi%2AR%5E2%29\"
\n" ); document.write( "\"A=2pi%2AR%5E2%2B2000%2FR%29\"
\n" ); document.write( "Take the derivative of area with respect to R and set it equal to zero.
\n" ); document.write( "\"dA%2FdR=4pi%2AR-2000%2FR%5E2=0\"
\n" ); document.write( "\"4pi%2AR=2000%2FR%5E2\"
\n" ); document.write( "\"R%5E3=500%2Fpi\"
\n" ); document.write( "\"R=%28500%2Fpi%29%5E%281%2F3%29\"
\n" ); document.write( "SO then,
\n" ); document.write( "\"H=1000%2F%28pi%2AR%5E2%29\"
\n" ); document.write( "\"H=1000%2F%28pi%2A%28500%2Fpi%29%5E%282%2F3%29%29\"
\n" ); document.write( "\"H=%281000%2F500%5E%282%2F3%29%29%281%2Fpi%5E%281%2F3%29%29\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );