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By 1875, the average value of the guz in Bengal was 36 inches (1.0 yd; 910 mm), but was 33 inches (840 mm) in Madras and 27 inches (690 mm) in Bombay. [ 1 ] [ 2 ] By the 20th century, the guz was uniformly quoted as being equal in length to one yard in the English system , or 0.91 metres in the metric system . [ 3 ]
Comparison of 1 square yard with some Imperial and metric units of area. The square yard (Northern India: gaj, Pakistan: gaz) is an imperial unit and U.S. customary unit of area. It is in widespread use in most of the English-speaking world, particularly the United States, United Kingdom, Canada, Pakistan and India.
At some time a value of 33 inches (838.2 mm) was adopted in California. [citation needed] In Texas, a vara was defined as 33 + 1 ⁄ 3 inches (846.67 mm), or 1 yard = 1.08 vara. [citation needed] The vara and the corresponding unit of area, the square vara, were introduced in the 19th century to measure Spanish land grants.
The yard standards of the different Commonwealth countries were periodically compared with one another. [26] The value of the United Kingdom primary standard of the yard was determined in terms of the meter by the National Physical Laboratory in 1964 to be 0.914 3969 m, [27] implying a pre-1959 UK foot of 0.304 7990 m.
The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 ... 32.8 feet; 11 yards; side of a square with area 100 m ...
In the evolutionary approach, the foot was to be derived from these lengths by a simple integer factor, which would be either three (pendulum) or five (rod), i.e. lengthening it from the traditional value of about 304 mm by slightly over 1 inch to ca. 331 mm or shortening it by about a quarter of an inch to ca. 298 mm.
The furlong went from 600 old feet (200 old yards) to 660 new feet (220 new yards). The acre went from 36,000 old square feet to 43,560 new square feet. Scholars have speculated that the Compositio may have represented a compromise between the two earlier systems of units, the Anglo-Saxon and the Roman.
Thus areas can be measured in square metres (m 2), square centimetres (cm 2), square millimetres (mm 2), square kilometres (km 2), square feet (ft 2), square yards (yd 2), square miles (mi 2), and so forth. [13] Algebraically, these units can be thought of as the squares of the corresponding length units.