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.
the breadth is 46.5 i think
cm
Perimeter = 400 meters.
120
346m
320
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.
Farmer's Field
A professional sized pitch is 300m in perimeter two 100m sides by two 50m ends