The amount of fence needed to surround 2 acres depends on the perimeter, not the area.
That would depend on the length and width of the acreage.
If the area is square-shaped, you would need 2,425 feet of fencing.
That depends on the shape of the lot. But, assuming the lot is a perfect square, you would need 10,560 feet (two miles) of fence to surround it.
An acre is 66 feet by 660 feet so 1,452 feet of fence would surround an acre.
That all depends on the shape of the lot. But, if the lot was a perfect square, you would need 5,280 feet (one mile) of fence to surround 40 acres.
60 acres is 9013 ft. in square pasture
1 acre = 43,560 square feet. 5 acres = 217,800 square feet. That's a square 466.69 feet on a side. If you need to fence all 4 sides, then you need 1,866.76 feet of fencing.
You would need 2,640 feet of fence.
9013 ft. square pasture
The length of a fence that surrounds 220 acres depends on the shape of the fence. A circular fence, a rectangle, a square, etc. If it's a square it would be 2.345 miles or 12383 feet long