The cylinders shown below are similar.
Two cylinders are shown side by side. The first cylinder has a height of 3 inches and a radius of 1 inch. The second cylinder has a height of 9 inches and a radius of 3 inches.
What is the ratio of their side lengths?
A. 1/27
B. 3/27
C. 1/9
D. 1/3
1 answer
The ratio of their side lengths is the ratio of their heights, which is 3/9 or 1/3. Therefore, the answer is $\boxed{\textbf{(D) }1/3}.$