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Mathematics for IGCSE & O level - Mensuration (Section 13 - No. 36)

If a sphere has a radius of 7cm, what is the formula for its surface area?
π * 7²
4 * π * 7²
2 * π * 7
4/3 * π * 7³

Объяснение

Surface area of sphere = 4πr²

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