To find the area of a square park, length of one side of square should be known.

The perimeter of the square park is 480m (given) , hence we can calculate the length of one side by dividing the perimeter by 4 (since a square has four equal sides).

Length of one side = Perimeter / 4 = 480m / 4 = 120m

Now that we know the length of one side, we can calculate the area of the square park by squaring the length of one side.

Area of square park = (Length of one side)^2 = 120m^2 = 14,400m^2

Therefore, the area of the square park is 14,400 square meters.