Given that the areas of two squares are in the ratio 9 to 1, what is the ratio of their perimeters?

Explanation

Since the ratio of the areas of the two squares is 9:1, the ratio of their side lengths is the square root of 9:1, which is 3:1. Because the perimeter of a square is directly proportional to its side length, the ratio of their perimeters is also 3:1.