Mathematics for IGCSE & O level - Mensuration (Section 13 - No. 19)
A cone has a base radius of 5cm and a slant height of 13cm. Calculate the total surface area of the cone.
Area of Base= 78.5cm²
Curved surface area = 204.2cm²
Total Surface area = 282.7 cm²
Total surface area = 245.1cm²
Forklaring
Area of Base = πr² = 78.5cm²; Curved surface area = π * radius * slant height = 204.2cm²; Total surface area = Area of Base + Curved surface area.