Mathematics for IGCSE & O level - Mensuration (Section 9 - No. 8)

A sphere has a surface area of 1274 cm². Calculate the radius.

10 cm

20 cm

12 cm

18 cm

Giải thích

Surface area = 4πr². Therefore, r = √(surface area / 4π) = √(1274 / 4π) ≈ 10 cm

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