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Surface area of a sphere = 4πr2

Given, surface area is 154 cm2

4 × (22/7) × r2 = 154

r2 = 49/4

r = 3.5 cm

Volume of a sphere = (4/3)πr3

Volume of the given sphere = (4/3) π × 3.53 = 179.66 cm3

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