Perimeter = 400 meters.
The perimeter is always the distance around the outside edge (of the field). However this will vary according to the size of the field; it is not a standardised distance.
120
320
346m
The question as asked cannot be answered. If the field were circular, the perimeter would be the least possible. But for a long thin field, the perimeter would be much larger.
5,347,962,110 Miles
The perimeter is 328 m. (Width: 64m length: 100m)
The answer may vary. If you take a square away from the field it will still have the same perimeter. So the Length and Width may vary on how you make the field.
A professional sized pitch is 300m in perimeter two 100m sides by two 50m ends
Since the dimensions of a standard football field are 105 x 68m, and a football field is a rectangle, then 105 + 68 + 105 + 68 = 346, so the perimeter is 346m.
The perimeter is the border or outer boundary around a two dimensional figure and is the length of such a boundary - a field for example, a perimeter fence