Formel Zylinder: V = π r 2 ∗ h = G ∗ h {\displaystyle V = \pi r^2 * h = G * h} M = 2 π r ∗ h = U ∗ h {\displaystyle M = 2 \pi r * h = U * h} O = M + 2 ∗ G = 2 π r ∗ h + 2 ∗ π r 2 = 2 π r ( h + r ) {\displaystyle O = M + 2 * G = 2 \pi r * h + 2 * \pi r^2 = 2 \pi r (h + r)}