Answer:
Option C. 3 : 2 is the correct option.
Explanation:
In this question the given parameters of the larger figure are r = 18 m amd h = 30 m. and for the smaller one r = 12 m and h = 20 m.
Now we will find the ratio of both larger : smaller one in terms of their radii and height.
Ratio of radii = 18/12 = 3/2
Or r : r' = 3 : 2
Ratio of heights = 30/20 =
Or h : h' = 3 : 2
Therefore only one answer is valid that is 3 : 2.