What is the CSA, TSA and volume of a frustum?
here is the answer Let ABC be a cone. A frustum DECB is cut by a plane parallel to its base. Let r1 and r2 be the radii of the ends of the frustum of the cone and h be the height of the frustum of the cone. In ΔABG and ΔADF, DF||BG ∴ ΔABG ∼ ΔADF CSA of frustum DECB = CSA of cone ABC − CSA cone ADE CSA of frustum = In ΔABG and ΔADF, DF||BG ∴ ΔABG ∼ ΔADF Volume of frustum of cone = Volume of cone ABC − Volume of cone ADE