The area described in the question is undefined; "20 acres" is an area itself, not a length.
3.0303... (recurring) acres.
Assuming the area is a rectangle, 242.42 acres.
100 feet by 80 feet is an area of 8,000 square feet. 8000 square feet = 0.183654729 acres
58 feet wide and a half a mile long is equal to 3.5 acres.
Thirty-five feet wide by five miles long equates to an area of 21.21 acres.
A 33-foot wide strip that is 5,280 feet long is an area of four (4) acres.
2.35 acres is an area of 102,366 square feet.
387 acres is an area of 16,857,720 square feet.
There are 43,560 square feet in an acre. The calculation shows that it would be 144 acres.
0.688 acres
The area is 500 feet times 600 feet = 300,000 quare feet. 300,000 quare feet are 6.887052 acres.
One acre is 43,560 square feet or 4840 square yards. The conversion would be 144 acres.