if the radius of a sphere is increased by 2 cm, then its surface area increase

Question

if the radius of a sphere is increased by 2 cm, then its surface area increases by 352 cm² . the radius of the sphere before the increase was :

Options:

A . 12 cm

B . 10 cm

C . 8 cm

D . 6 cm

Answer: Option D
Explanation :

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