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The United States retained the 1 / 39.37 -metre definition for surveying, producing a 2 millionth part difference between standard and US survey inches. [47] This is approximately 1 / 8 inch per mile; 12.7 kilometres is exactly 500,000 standard inches and exactly 499,999 survey inches.
An adult human foot is about 28 cm (11 in) long. The decimetre ( SI symbol: dm ) is a unit of length in the metric system equal to 10 −1 metres ( 1 / 10 m = 0.1 m ). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).
The tallest U.S. president was Abraham Lincoln at 6 feet 4 inches (193 centimeters), while the shortest was James Madison at 5 feet 4 inches (163 centimeters). Joe Biden, the current president, is 6 feet 0 inches (183 centimeters) according to a physical examination summary from February 2024. [2]
The system was slightly revised in 1735. In 1855, a decimal reform was instituted that defined a new Swedish inch as 1 ⁄ 10 Swedish foot (2.96 cm or 1.17 inches). Up to the middle of the 19th century, there was a law allowing the imposition of the death penalty for falsifying weights or measures.
Both models can be described as 15 mm, but the real world sizes depend on the size of the reference humanoid. In practice, the reference humanoid is generally assumed to be the idea of the average height of the human male, within a 6-inch (15 cm) interval between 5.5 and 6 feet (168 and 183 cm), unless otherwise indicated by the designer.
Centimeters (cm) are avoided as they cause confusion when reading plans. For example, the length two and a half meters is usually recorded as 2500 mm or 2.5 m; it would be considered non-standard to record this length as 250 cm. [7] [8]
This translates to a hoppus foot being equal to 1.273 cubic feet (2,200 in 3; 0.0360 m 3). The hoppus board foot, when milled, yields about one board foot. The volume yielded by the quarter-girth formula is 78.54% of cubic measure (i.e. 1 ft 3 = 0.7854 h ft; 1 h ft = 1.273 ft 3). [46]
In the 21st century, 20 of the 24 Formula One seasons have been won by competitors shorter than 1.80 m (5 ft 11 in), including 1.71 m (5 ft 7 + 1 ⁄ 2 in) Fernando Alonso, 1.74 m (5 ft 8 + 1 ⁄ 2 in) Michael Schumacher and Lewis Hamilton, 1.75 m (5 ft 9 in) Kimi Räikkönen and Sebastian Vettel, and 1.78 m (5 ft 10 in) Nico Rosberg, with the ...