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One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.
As the name suggests, an acre-foot is defined as the volume of one acre of surface area to a depth of one foot. Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3). There has been two definitions of the acre-foot (differing by about 0.0006%), using ...
In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters. The rod is useful as a unit of length because integer multiples of it can form one acre of square measure (area).
An arpent can mean a linear measurement of approximately 192 feet (59 m) or an area measurement of about 0.84 acres (3,400 m 2). The area measurement is also sometimes referred to as an arpent carré (square arpent) or an arpent de surface. [5]
An Olympic-size swimming pool holds over 2 acre-feet of water For larger volumes of liquid, one measure commonly used in the media in many countries is the Olympic-size swimming pool. [47] A 50 m × 25 m (164 ft × 82 ft) Olympic swimming pool, built to the FR3 minimum depth of 2 metres (6.6 ft) would hold 2,500 m 3 (660,000 US gal).
The gunta or guntha is a measure of area used in the ... × 33 ft (10 m) = 1,089 sq ft (101.2 m 2) [1] [2] 40 gunthas = 1.0 acre; 4 acre = 1 fg; ... Acre-foot; Acre ...
Hence each Katha is 2,880 square feet (268 m 2) in area, although this may vary within different regions of Assam. 4 bighas together are further termed as a Pura. 1 Katha = 2,880 square feet (268 m 2) or 320 sq yard; 1 Lessa = 144 square feet (13.4 m 2) or 16 sq yard; 1 Acre = 3.025 bigha and 1 Hectare = 7.475 bigha (Assam)
The unit is still in use in many areas previously ruled by the Ottomans, although the new or metric dunam has been redefined (as of when, by who?) as exactly one decare (1,000 square metres [10,760 square feet]), which is 1/10 hectare (1/10 × 10,000 square metres [107,640 square feet]), like the modern Greek royal stremma. [3]