SSC CPO Tier 1 Exam 03 Oct 2023 Shift 1

The radii of the ends of a frustum of a solid right-circular cone 45 cm high are 28 cm and 7 cm. If this frustum is melted and reconstructed into a solid right circular cylinder whose radius of base and height are in the ratio 3 ∶ 5, find the curved surface area (in cm²) of this cylinder. [Usе π = $\frac{22}{7}$]