It depends what aircraft and what speed you are going
an added tank
One of the main reasons is to conserve fuel. Airplanes can fly at any altitude and speed. However, airplanes generally tend to fly at high altitude to conserve fuel. This makes the plane more efficient and keeps the operating cost down. Of course, an airplane can not always fly at max altitude at every flight. It may have too much weight or the distance it travels may be too short. So there is always a trade-off as to how they will fly the route.
There is no certain cruising altitude for a commercial airline. it depends on where they are flying and how long they fly. most airlines fly above 10,000 ft. the max altitude is around 41,000 ft.
10 kilometers (about 32,808 feet).
At cruising altitude most airplanes are at between 35,000 and 41,000 feet. However, to get there it has to pass all of the intervening feet between that and the altitude of the airport.
A jetstream is a very powerful, high altitude wind. It can affect aircraft that fly through it by shaking and buffeting.
Depends on the airplane. Every aircraft has different specific guidelines for altitude, velocity, max wind speed and weight, as well as many other limitations.
Can you fly on airplane with pericarditis
The airplane was flying at a very high altitude.
because it has been pressurised in a similar way (outcome) to how a commercial airplane is pressurised for passengers to fly at altitude.
Maximun is 45,000 ft under ATC, Absolute Maximun is 60,000 without special permission from the FAA
Air bus 380 can fly with max speed of 1020km/h.Its maximum operating speed at cruise altitude is 945 km/h.