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Although most contemporary accounts used an Arabic mile of 6 444 feet (1,964 metres), which gave a Spanish league of the degree of 25,776 feet (7,857 metres or 4.242 modern nautical miles) others defined an Arabic mile as just 6,000 feet making a Spanish league of the degree 24,000 feet (or 7,315 metres, almost exactly 3.95 modern nautical miles).
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 college football standard, which was the previous standard in the NFL (from 1945 to 1971), is 40 feet apart (20 yards from the sidelines), [7] instituted in 1993. [ 8 ] [ 9 ] Previously, the college width was the same as the high school standard, at one-third of the width of the field (53 1 ⁄ 3 feet).
The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty in 1959. [2] [5] Common imperial units and U.S. customary units of length include: [6] thou or mil (1 ⁄ 1000 of an inch) inch (25.4 mm) foot (12 inches, 0.3048 m) yard (3 feet, 0.9144 m)
The penalty area (colloquially "the 18-yard box" or just "the box") is similarly formed by the goal-line and lines extending from it, but its lines start 18 yards (16.46 metres) from the goalposts and extend 18 yards (16.46 metres) into the field. i.e. this is a rectangle 44 yards (40.23 metres) by 18 yards (16.46 metres).
[46] [47] However, many units of measure, such as the livre (for half a kilogram), remained in everyday use for many years, [47] [48] and to a residual extent up to this day. Conversion table in an 1848 German schoolbook showing the metric equivalent of the foot in use in over two dozen countries, including several German states
4.509 km – height of Mount Wilhelm, highest peak in Papua New Guinea; 4.810 km – height of Mont Blanc, highest peak in the Alps; 4.884 km – height of Carstensz Pyramid, highest peak in Oceania [147] 4.892 km – height of Mount Vinson, highest peak in Antarctica; 5.610 km – height of Mount Damavand, highest peak in Iran
A half marathon is a road running event of 21.0975 kilometres (13 miles 192.5 yards)—half the distance of a marathon. [1] It is common for a half marathon event to be held concurrently with a marathon or a 5K race, using almost the same course with a late start, an early finish, or shortcuts. [2]