Question

x³+y³+z³=k

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Answer 1

Answer:

Let r cm be the radius of sphere.

Surface area of the sphere = 4πr2

⇒ 154 = 4πr2 ⇒ 4 x 22/7 x r2 = 154

r2 = 154 x 7/4 x 22 = 72/22 ⇒ r = 7/2

Volume of sphere = 4/3πr3

= 4/3 x 22/7 x 7/2 x 7/2 x 7/2 cm3

= 539/3 cm3 = 179.2/3 cm3

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