Input (grade 12): Jet aircraft generally fly much faster than propeller-powered aircraft and at higher altitudes - as high as 10,000 to 15,000 meters (about 33,000 to 49,000 ft).
Output (grade 11): Unlike propeller-powered aircraft, jet aircraft normally fly at altitudes as high as 10,000 to 15,000 meters, about 33,000 to.