Mathematics for IGCSE & O level - Mensuration (Section 3 - No. 18)
Calculate the total surface area of a solid hemisphere with radius 7.1 cm and diameter 4.7 cm.
330.3 cm²
356.1 cm²
287.6 cm²
264.2 cm²
คำอธิบาย
The question asks for the solid hemisphere with radius 7.1 cm so the answer is 3πr² = 3 * π * 7.1² ≈ 475 cm²