Question

Surface area of a sphere whose radius is 1 unit

Answer 1

Taking the value of π = 3.14

Surface Area Of Sphere = 12.56 unit

Taking the value of π = 22/7

Surface Area Of Sphere = 12.57 unit

Step-by-step explanation:

GIVEN

Radius = 1 unit

π = 3.14 or 22/7

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To Find

Surface Area Of Sphere

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Formulas Of Sphere

Diameter Of Sphere = 2 × r

Surface Area Of Sphere = 4 × π × r²

Volume Of Sphere = (4 ⁄ 3) × π × r³

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Taking the value of π = 3.14

We know that,

Surface Area Of Sphere = 4 × π × r²

Surface Area Of Sphere = 4 × 3.14 × (1)²

Surface Area Of Sphere = 4 × 3.14 × 1

Surface Area Of Sphere = 4 × 3.14

Surface Area Of Sphere = 12.56

Surface Area Of Sphere = 12.56 unit

___________________________

Taking the value of π = 22/7

We know that,

Surface Area Of Sphere = 4 × π × r²

Surface Area Of Sphere = 4 × 22/7 × (1)²

Surface Area Of Sphere = 4 × 22/7 × 1

Surface Area Of Sphere = 4 × 22/7

Surface Area Of Sphere = 12.5714286

Surface Area Of Sphere = 12.57 unit