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Solution
Radius of sphere = $$r=\frac{42}{2}=21$$ cm
Volume of sphere = $$\frac{4}{3}\pi r^3$$
= $$\frac{4}{3}\times\frac{22}{7}\times(21)^3$$
= $$88\times(21)^2=38808$$ $$cm^3$$
=> Ans - (C)
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