Answer:
10 inches
Explanation:
Assuming that by 'deep' you mean length, we can set up a simple algebraic expression to solve this problem. We know that a rectangle has 4 sides, 2 of them equal sides, and all of those sides added up equals the perimeter. To say that algebraically,
. We can fill in the blanks on this equation to solve.
The length of the other side is 10 inches.
Hope this helped!