Outside the plane, the wind temperature is -20C. At what altitude does the flight take

Outside the plane, the wind temperature is -20C. At what altitude does the flight take place if the temperature is + 16C near the surface of the earth?

1) It is known that for every kilometer of altitude, the air temperature drops by 6 ° C.

2) Let us find the amplitude of air temperatures outside the plane and at the surface of the earth.

-20 ° C – 16 ° C = -36 ° C.

3) Find the altitude at which the flight takes place. To do this, divide the air temperature amplitude by 6 ° C.

-36 ° C / 6 ° C = 6 km.

Answer: the flight takes place at an altitude of 6 km.