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Bas_tet [7]
3 years ago
15

What is the surface area of a sphere with a radius of 9 units?

Mathematics
2 answers:
Mila [183]3 years ago
5 0

Answer : The surface area of a sphere is, 1017.36unit^2

Step-by-step explanation :

To calculate the surface area of sphere, we use the formula:

A=4\pi r^2 .....(1)

where,

r = radius of sphere

A = surface area

Given :

Radius of sphere = 9 units

Now put all the given values in the above formula (1), we get:

A=4\times 3.14\times (9)^2

A=1017.36unit^2

Therefore, the surface area of a sphere is, 1017.36unit^2

Vinvika [58]3 years ago
4 0

Answer:

see explanation

Step-by-step explanation:

The surface area (A) of a sphere is calculated as

A = 4πr² ← r is the radius, here r = 9, thus

A = 4π × 9² = 4π × 81 = 324π ≈ 1017.9 units²

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