If the radii of two cylinders are in the ratio 2 : 3 and their heights are in the ratio 5 : 3, then find the ratio of their volumes.
Given,
Ratio of radii = 
1:r2 = 2:3
Ratio of heights = h1:h2 = 5:3
Ratio of volumes of cylinders = 
12h1) : (πr22h2) = 
4