Mathematics for IGCSE & O level - Mensuration (Section 8 - No. 41)
Calculate the total surface area of a solid hemisphere with radius 7.1 cm and diameter 4.7 cm.
264.2 cm²
356.1 cm²
330.3 cm²
287.6 cm²
설명
Surface area of hemisphere = 3πr². 3 * π * 7.1² ≈ 475 cm²; In this case, diameter/2. SA = 2πr² + πr² ≈ 52 cm²