ANSWER
60 feet
Step-by-step explanation
We have that the area of the square garden is 225 square feet.
To find the perimeter, we have to first find the length of the sides of the garden.
The area of a square is given as:
This means that:
The perimeter of a square is given as:
P = 4L
So, the perimeter of the garden will be:
P = 4 * 15
P = 60 feet
The perimeter will be 60 feet.