Mathematics for IGCSE & O level - Mensuration (Section 3 - No. 23)
A cone has a base radius of 6 cm and a perpendicular height of 8 cm. Calculate its curved surface area.
188.5 cm²
301.6 cm²
204.2 cm²
150.8 cm²
Giải thích
Slant height = √(6²+8²) = 10. Curved surface area = πrl = π * 6 * 10 ≈ 188.5 cm²