Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 48)
A cone has a base with radius 5 cm and a slant height of 10 cm. What is the curved surface area of the cone?
50π
25π
100π
10π
คำอธิบาย
Curved surface area = π * radius * slant height = π * 5 * 10 = 50π.