Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 22)

A solid cone has a base radius of 6.5cm and a height of 6.3cm. Calculate its total surface area.

336.1 cm²

268.7 cm²

280.3 cm²

266.4 cm²

Explanation

Slant height = √ (r² + h²) = √ (6.5² + 6.3²) = 9.05cm; Area of base = πr² = 132.7cm²; Curved surface area = π * radius * slant height = 184.7cm²; Total Surface Area = 184.7 + 132.7= 317.4cm²

Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 22)

Explanation

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