Question
Find the volume and surface area of a sphere of radius 10.5 cm.
Answer: Option A
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Volume = `4/3 pi r^3`
= `(4/3 xx 22/7 xx 21/2 xx 21/2 xx 21/2) cm^3 =4851 cm^3`
Surface area = `4 pi r^2 = (4 xx 22/7 xx 21/2 xx 21/2) cm^2 = 1386 cm^2`
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