The volume of a sphere is 38808 cu. cm. The curved surface

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The volume of a sphere is 38808 cu. cm. The curved surface area of the sphere is ?

1. 5544 sq. cm
2. 1386 sq. cm
3. 8316 sq. cm
4. 4158 sq. cm

Correct Option: A

∵ 4/3 x 22/7 x r³ = 38808
⇒ r³ = (38808 x 7/22 x 3/4)
= (21)³
∴ r = 21 cm
So, curved surface area of sphere
= 4πr²
= (4 x 22/7 x 21x21) cm²
= 5544 cm²