To find the area of the garden including the path, you will find the side length of each side of the square by taking the square root of 576 to get 24 meters.
Add 3 feet to both sides of each side length because the walkway is going all the way around to get (24 + 3 + 3) = 30 meters.
The new area of the garden including the walkway will be 30 m x 30 m or 900 square meters.
