Q. 63.6( 16 Votes )

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Answer :

Thickness of sphere, t = 0.01m = 1 cm


Diameter of sphere = 12 cm


Outer Radius of sphere, RO = 6 cm


Inner Radius of sphere, RI = RO – t = 6 – 1 = 5 cm


Outer Surface area of sphere, A = 4πRO2


A = 4× 3.14 × 62


A = 452.16 sq.cm





V = 381.33 cm3



Mass = 8.88 × 381.33


Mass = 3385.94 gm


Outer surface area and mass of the sphere is 452.16 sq.cm and 3385.94 gm


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