Question

There is a football field. Around the field is the section of a spectator. The edge of the football field is 5 meters distance from the outside edge of the section of the spectator. The section of the viewer is 130m in length and has a width of 85m. The use of these measures is the area of the football field.

Answer 1

If I read your language correctly, there is a 5m border around the field.

So, if the dimensions of the whole area is 130x85, then the field is 120x75.