military aircraft will fly at any height. one tactic they use to avoid radar is to fly as low as possible as low as 10-20 m. there are aircraft used in military operatrions that fly as high as 80,000 ft or 24 km above the ground.
Military planes can only be flied by the military officers because the officers are well-trained and highly qualified to fly the military aircrafts. The officers are trained in high altitudes and in many different regions which helps them in flying the aircraft in bad whether or whatever the condition is.
Yes.
Planes fly high to get above the weather, and to avoid air traffic. For jet planes, certain altitudes, all quite high, afford more efficient flight conditions.
Normal planes go at 40,500 feet from ground.
Most commercial jet liners fly in the stratosphere. Some military aircrafts fly higher than that. Small planes fly lower than the jet liners.
Military aircrafts fly the same height as the commercial airplanes do. The cruising altitude maybe 30000 feet to 45000 feet. Planes like SR-71 have gone upto the maximum of 85,000 feet.
30000
Around 11km
Passenger planes can't fly at 55,000 feet. Gulfstream business jets can fly 51,000 feet altitude, and airliners like to cruise at 35,000 feet. Some military planes, like the U-2, can fly at 55,000 feet or greater.
They can fly but they have a high chance of getting damaged.
If they are in the air so the answer is no, because if planes fly at high altitude and at high speed. It makes it alot difficult to get planes shot down.
High-speed fighter planes have aerofoil-shaped wings.