Zylinder V = r2 * pi * h hier (h/2)2 + r2 = R2
also r2 = R2 - h2 / 4
also V = ( R2 - h2 / 4 ) * pi * h
= R2 * pi * h - pi /4 * h3
V ' (h) = pi ( R2 - 3h2 )
Also V ' = 0 für h = R / √3 und dann r2 = 2R2 / 3Also Vmax = ( 2R2 / 3 ) * pi * R / √3 = 4piR3 / ( 3√3)
und Kugel V = 4piR3 / 3
Also VKugel : Vmax.Zylinder = √3