It's about as long as Louis-Antoine's reign
(a.k.a. Louis-Antoine d'Artois, petit-fils de France, fils de France, duc d'Angoulême, a.k.a. Count of Marnes) (1830)
Following his father, Charles X's, abdication on the eve of the 1830 French Revolution, Louis-Antoine d'Artois was technically king for a period of approximately twenty minutes on August 2nd, 1830. Louis-Antoine's only official act as king was to abdicate the throne to his nephew, the Henri, the Duke of Bordeaux.
It's about one-and-seven-tenths times as long as The First spacewalk
In other words, 20 minutes is 1.7 times the length of The First spacewalk, and the length of The First spacewalk is 0.59 times that amount.(1965) (Alexi Lenovo, a.k.a. Алексе́й Архи́пович Лео́нов)
On March 18th, 1965, during the Voskhod 2 Soviet space mission, cosmonaut Alexey Arkhipovich Leonov conducted the first human spacewalk, which lasted 12 minutes. The total mission length was 1,600 minutes.
It's about two-fifths as long as a Basketball game
In other words, 20 minutes is 0.417 times the length of a Basketball game, and the length of a Basketball game is 2.4 times that amount.(NBA regulation; playing time only)
Per National Basketball Association rules , a basketball game (without an overtime) consists of four periods of 12 minutes each, for a total of 48 minutes of playing time. The first basketball game, played in a Springfield Massachusetts YMCA, was played in two 15-minute halves and ended with a score of 1-0.
It's about one-third as long as The Football game (American)
In other words, 20 minutes is 0.33 times the length of The Football game (American), and the length of The Football game (American) is 3 times that amount.(a.k.a. American football) (per NFL rules; playing time only)
Per National Football League Rules, an American football game consists of four periods of 15 minutes each for a total of 60 minutes. The total duration of a football game can often be more than three hours, including stoppages of play, the intermission at halftime, team timeouts, and, in televised games, commercial timeouts. The Super Bowl — the highest-profile game of the sport — aired 45 minutes of commercials in 2009.
It's about one-fifth as long as a Football game (Association) (Soccer)
In other words, 20 minutes is 0.22 times the length of a Football game (Association) (Soccer), and the length of a Football game (Association) (Soccer) is 4.5 times that amount.(a.k.a. association football, a.k.a. soccer) (per FIFA rules; playing time only)
Per Fédération Internationale de Football Association (FIFA) Laws of the Game, an association football game consists of two periods of 45 minutes each, for a total of 90 minutes of playing time (except in games played by women, or by players under 16 or over 35 years of age). The longest recorded amateur football game was a 2009 match in the Filipino town of Barotac Nuevo that lasted for 35 hours and 20 minutes.
It's about one-tenth as long as Gone with the Wind (film)
In other words, 20 minutes is 0.088 times the length of Gone with the Wind (film), and the length of Gone with the Wind (film) is 11.3 times that amount.(1939)
Gone with the Wind, the multiple Academy Award-winning film, had a running time of 226 minutes for its 1939 copyright release. The scene depicting the burning of the Atlanta Depot cost $25,000 (unadjusted) and was filmed on a 0.16 sq. km (40-acre) set using all seven Technicolor cameras in existence at the time.
It's about one-twentieth as long as The First Indianapolis 500
In other words, 20 minutes is 0.04974 times the length of The First Indianapolis 500, and the length of The First Indianapolis 500 is 20.107 times that amount.(a.k.a. Indy 500, a.k.a. International 500-Mile Sweepstakes Race) (1911) (Indianapolis, Indiana)
The first recorded automobile race of its distance, the inaugural Indianapolis 500 was won by Ray Harroun in 402.130 minutes. Haroun's average speed through the race was 120 kph (74.59 mph).