Question

calculate the surface area of a sphere with radius 3.2cm.

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Answer 1

Answer:

Step-by-step explanation:

we know that surface area of sphere = 4piRsq.

here R, radius= 3.2 cm

hence, surface area= 4*22/7*3.2*3.2

=2258/175

=12.90

Answer 2

Answer:

The surface area of a sphere with a radius of 3.2cm is 128.67 cm²

Step-by-step explanation:

• The region covered by the outer surface of a sphere in three-dimensional space is called the surface area of a sphere

• The surface area of a sphere is given by 4πr²
• We are provided with the radius of a sphere i.e. 3.2cm and we are asked to calculate the surface area of a sphere

Step 1:

The surface area of a sphere = 4πr²

Substitute the value of radius in the formula above

we get,

The surface area of a sphere = 4π(3.2)²

The surface area of a sphere = 128.67 cm²

Therefore the surface area of a sphere comes out to be 128.67 cm²