Minimizing the surface area of a cylinder

In this figure, the volume of the green cylinder remains fixed at 1 Liter ([math]V=1000\text{ cm}^3[/math]). [br][br]Use the slider to change the radius of this cylinder to obtain an estimate of this value that minimizes the total surface area of this cylinder.
[i]Developed for use with Thomas' Calculus, published by Pearson.[/i]

Information: Minimizing the surface area of a cylinder