The radii of the bases of two cylinders are in the ratio 3 : 4 and their height are in the ratio 4 : 3. The ratio of their volume is :
Options:
A . 2 : 3
B . 3 : 2
C . 3 : 4
D . 4 : 3
Answer: Option C Let their radii be 3x, 4x and heights be 4y, 3y Ratio of their volumes : $$\eqalign{ & = \frac{{\pi \times {{\left( {3x} \right)}^2} \times 4y}}{{\pi \times {{\left( {4x} \right)}^2} \times 3y}} \cr & = \frac{{36}}{{48}} \cr & = \frac{3}{4}\,Or\,3:4 \cr} $$
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