Mathematics for IGCSE & O level - Mensuration (Section 10 - No. 8)
The total surface area of a hemisphere has an area of 94cm². Calculate the curved surface area.
63 cm²
60 cm²
61 cm²
62 cm²
คำอธิบาย
Total Surface Area = 3πr², Curved surface area = 2πr², Curved surface area = 2/3 * Total Surface Area = 62.7cm²