Question

calculate the surface area of a sphere whose volume is 4851 cm3

Answer 1

volume of sphere=4/3πr³
∴4/3πr³ = 4851
 4/3*22/7*r³ = 4851
               r³ = 4851*3*7/4*22
               r³ = 9261/8
             ∴  r = 21/2
surface area = 4πr²
 ∴ 4*22/7*21/2*21/2 = 1386 cm²

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Answer 2

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