Mathematics for IGCSE & O level - Mensuration (Section 7 - No. 4)

Find the radius of a sphere with a surface area of 153.9 cm².

2 cm

3 cm

4 cm

5 cm

Paliwanag

Surface Area = 4πr². Radius r =√(Surface Area / 4π) = √(153.9 / 4π) ≈ 3.5cm

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