The number of square units required to fill a square is the area.
Area of a square = side × side
Area of a square = side2 square units
Area of a square field = 479 ft2 [Given]
So the side can be determined by
Length of a side of the field = √479 = 21.9 feet
Therefore, the length of a side of the field is 21.9 feet.
A square field has an area of 479 ft2. The approximate length of a side of the field is 21.9 feet.