Find the surface area of a sphere whose diameter is equal to 84 cm

Correct option is C

Given:

Diameter of the sphere = 84 cm

Radius r = $$\frac{84}{2}$$​ = 42 cm

Formula Used:

Surface Area of sphere = $$4\pi r^2$$​​

Solution:

Surface Area of the sphere = $$4 \times \pi \times 42^2$$​​

​$$= 4 \times \pi \times 1764$$​​

​$$=7056 \pi\ \text{cm}^2$$​​​

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