A square foot is a unit of area. A centimetre is a unit of length. The two units are therefore incompatible.
640 square feet = 71.1 square yards.
640 acres = 27,878,400 square feet.
640 acres = 27,878,400ft²
There are 30.48 centimetres in one foot. Therefore, rounded to two decimal places, 640 centimetres is equal to 640/30.48 = 21.00 feet.
43560 square feet in an acre. 640 acres in a square mile.
80 feet x 8 feet = 640 square feet.
71.11 square yards.
640 acres is 27,878,400 square feet (@43,560 sq ft per acre).
4.4444. 144 square inches to a square foot.
20
There are 43,650 square feet in one acre. (There are 640 acres in one square mile and 27.878,400 square feet in the same area. 27,878,400 divided by 640 equals 43,650. To find how many square inches in an acre, multiply number of square feet by 144.
An area 14 by 60 cm would contain 640 cm2.