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How fast is 68.52 kilometers per minute?

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It's about one-and-one-fourth times as fast as a Bullet (Rifle).
In other words, 68.52 kilometers per minute is 1.25 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 0.8 times that amount.
(5.56 x 45 mm, a.k.a. 5.56 NATO)
A 5.56 x 45 mm cartridge is fired at a velocity of 54.9 kilometers per minute. As the NATO rifle cartridge, it is used by the military forces of more than thirty-one countries, including use in the M16 series, M4 Carbine, HK-416, and M249 Squad automatic weapons used by the United States armed forces.
It's about one-and-seven-tenths times as fast as a Jet Fighter.
In other words, the speed of a Jet Fighter is 0.59 times 68.52 kilometers per minute.
(for Lockheed Martin F-16, a.k.a. Fighting Falcon, a.k.a. Viper) (maximum speed at altitude)
An F-16's maximum speed at altitude is approximately 40 kilometers per minute. The F-16 has a flight ceiling of approximately 15 km (9.32 mi).
It's about three times as fast as a Bullet (Handgun).
In other words, 68.52 kilometers per minute is 2.97 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 0.337 times that amount.
(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 23 kilometers per minute. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about three-and-a-half times as fast as The Speed of Sound.
In other words, 68.52 kilometers per minute is 3.33 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.3 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 20.6 kilometers per minute. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 89.8 kilometers per minute to 93.6 kilometers per minute in water, depending on its salinity.
It's about one-tenth as fast as The Space Shuttle.
In other words, 68.52 kilometers per minute is 0.14748 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 6.7806 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 464.62 kilometers per minute. During liftoff, the space shuttle accelerates to orbital speed in 8.5 minutes, consuming over 1.59 million kg (3.51 million lbs) of propellant in the process.
It's about ten-and-a-half times as fast as a Peregrine Falcon.
In other words, the speed of a Peregrine Falcon is 0.0943 times 68.52 kilometers per minute.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 6.48 kilometers per minute when diving. Falcons are sometimes sent to scare smaller birds away from airports to improve air traffic safety and were used in World War II to intercept carrier pigeons used by enemy forces.
It's about twelve times as fast as The CRH (train).
In other words, the speed of The CRH (train) is 0.083 times 68.52 kilometers per minute.
(a.k.a. Hexie Hao, 和谐号, a.k.a. 和諧號, a.k.a. Héxié Hào, a.k.a. "Harmony")
The CRH-3 train which runs on China's Beijing-Tianjin Intercity Railway are capable of speeds up to 5.8 kilometers per minute. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.