I have a 60" and cut one acre per hour. If you can afford a 72" cut you will get some of your time back.
Probably 48" is as small as you would want to consider.
The number of tractor trailers that can be parked on 5 acres depends on parking layout and space utilization. A typical tractor trailer requires about 60 to 70 feet of length and 10 to 12 feet of width, which equates to approximately 0.15 to 0.2 acres per trailer when accounting for maneuvering space. Therefore, you could potentially park around 25 to 30 tractor trailers on 5 acres, assuming efficient use of space and proper layout.
A square with an area of 99 acres has a length and width of 2,077 feet.
depends on the length
Answer: 12.397 acres.
That would be 25.8 acres.
102 inch maximum width without requiring an oversize permit.
A square with an area of 80 acres has a length and width of 1,867 feet. The diagonal length of the square is 2,640 feet.
A great deal of this answer will depend on what obstacles you have on your property. If you don't have many obstacles and are over an acre I would get at least a 42" mower. If you are under an acre a 38" will probably work fine and take up less garage space.
10 acres squared is a volume in 4 dimensional space!
102 inches
643.28 feet x 643.28 feet for a square-shaped lot of 9.5 acres.