Solution
Diameter of hemisphere = 21 cm
Volume of hemisphere = $$\frac{2}{3}\times\pi r^3$$
= $$\frac{2}{3}\times\frac{22}{7}\times(\frac{21}{2})^3$$
= $$\frac{11\times441}{2}=2425.5$$ $$cm^3$$
=> Ans - (B)
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