Question 23

Find the volume $$(in cm^3)$$ of a sphere of diameter 42 cm.

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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