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Mathematics for IGCSE & O level - Mensuration (Section 2 - No. 40)

A sphere has a surface area of 1274 cm². What is its radius?
10 cm
20 cm
18 cm
12 cm

Penjelasan

Surface Area = 4πr². r = √(SA / 4π). Therefore r = √(1274 / 4π) ≈ 10 cm

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