Question 5:
Derive the formula for the curved surface area and total surface area of the frustum of cone.
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.
CSA of frustum DECB = CSA of cone ABC − CSA cone ADE
Total surface area of frustum = CSA of frustum + Area of upper circular end + Area of lower circular end
Latest Govt Job & Exam Updates: