Find the surface area of a sphere whose diameter is equal to 112 cm.

Correct option is D

Given:
The diameter of the sphere is 112 cm.
Formula Used:
Surface area of a sphere = 4π r²
where r is the radius of the sphere.
Solution:
Radius r is half of the diameter.
$$r = \frac{112}{2} = 56 \, \text{cm}$$​
Surface Area = $$= 4 \times \frac{22}{7} \times (56)^2 = 4 \times \frac{22}{7} \times 3136 = 39424 \, \text{cm}^2$$​