Question

Igue
2. Find the surface area of a sphere of diameter 21 cm.​

Answer 1

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Answer 2

Answer:

Diameter of Sphere = 21 cm

Radius = 21/2 = 10.5 cm

Surface Area of Sphere = $4\pi {r}^{2}$

Surface Area = $4\pi {10.5}^{2} = 4 \times \frac{22}{7} \times 110.25$

$= 1386$

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