Question

Find the surface area of a sphere
with a radius of 9 cm.
Surface Area = [?] cm?

Answer 1

`1,017.36 \: {cm}^(2)`

Explanation:

Surface area of a sphere

`= 4\pi {r}^(2) \\ = 4 * 3.14 {(6)}^(2) \\ = 12.56 * 81 \\ = 1,017.36 \: {cm}^(2)`

Answer 2

1017.36 cm²

Explanation:

Given :-

• Radius = 9cm .

We know ,

• SA = 4π r²
• SA = 4* 3.14 * (9cm)²
• SA = 4 *3.14*81cm²
• SA = 1017.36 cm²