a) $$18\pi $$ m3
b) $$36\pi $$ m3
c) $$72\pi $$ m3
d) None of these
Answer: a
Explanation: Volume of hemisphere :
$$\eqalign{
& = \left( {\frac{2}{3}\pi \times 3 \times 3 \times 3} \right){m^3} \cr
& = \left( {18\pi } \right){m^3} \cr} $$
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