Two cylinders are similar. The radius of cylinder A is 5.6 inches. The radius of cylinder B is 1.4 inches. I the height of cylinder B inches. What is the height of cylinder A

The answer is 16 inches.

Let r be a radius and h be a height of a cylinder

Since the cylinders are similar, then the ratio between their radiuses is equal to the ratio of their heights:

r1 : r2 = h1 : h2

Cylinder A:

r1 = 5.6 in

h1 = ?

Cylinder B:

r2 = 1.4 in

h2 = 4 in

5.6 : 1.4 = h1 : 4

h1 = 4 * 5.6 : 1.4

h1 = 16 inches