Why are airplanes flown only at an altitude of 30 to 40 thousand feet? Is mileage also a factor?

Why are airplanes flown only at an altitude of 30 to 40 thousand feet?  Is mileage also a factor?

Aeroplane: Plane is the fastest means of transport for long distance travel as well as saving time. Passenger planes mostly fly at 30 or 40 thousand or more. In case of an accident at such a height, the risk is also high and the oxygen also gets reduced. Now the question is why the airplane is flown at the same height even after this? increases mileage There are many reasons for flying the plane at high altitude. Dense air molecules are the reason for not flying at low altitude. At…

Read More