640 square feet = 71.1 square yards.
how many boxes of wood flooring would i need if there are 19.72 sq feet in a box to cover 640 sq feet of an area?
0.5 miles is bigger than 640 feet.
640
640
640
71.11 square yards.
There are (22/3) times (16/3) = 39.'1' square yards recurring '1'
1 yard = 3 feet 640 yards = 1920 feet
640 acres = 27,878,400 square feet.
6 inches = 0.5 foot27 cubic feet = 1 cubic yardVolume = (640 x 0.5) = 320 cubic feet = 1123/27 cubic yards = 11.852 (rounded)
The answer to how many yards depends upon how deep the material (ie, rock or mulch) is to be in the area. Using mulch as the material, at 2" deep, the anwer would be 4.26 yards (formula is L X W divided by 150) 640/150= 4.26 yards At 3" deep, the answer is 6.40 yards (L X W divided by 100) 640/100=6.4
640 acres = 27,878,400ft²
1 acre is equal to . . . -- 43,560 square feet -- 4,840 square yards -- 1/640 square mile -- 0.0015625 square mile
43560 square feet in an acre. 640 acres in a square mile.
80 feet x 8 feet = 640 square feet.
640 acres is 27,878,400 square feet (@43,560 sq ft per acre).
4.4444. 144 square inches to a square foot.