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Question

Find the surface area of a sphere of radius 10.5cm. Assume π=227


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Solution

Find surface area of sphere

Given, radius of sphere, r=10.5cm

Surface area (S) of a sphere is given as,

S=4πr2

Thus,

S=4·227·10.52=1386cm2

Therefore, surface area of the sphere of radius 10.5cm is 1386cm2


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