Mathematics for IGCSE & O level - Mensuration (Section 4 - No. 49)
Calculate the curved surface area of a cone of slant height 10cm and base radius 3cm.
94.2 cm²
93.8 cm²
14.3 cm²
98.7 cm²
解释
Curved Surface Area of a Cone = πrl. π * 3 * 10 ≈ 94.2 cm²