Question 837196
i believe the formula will be:
T = G - H/100
T is temperature in centigrade degrees.
G is the temperature in centigrade degrees at ground level.
H is the height above ground level measured in meters.


assuming the temperature at ground level is 20 degrees centigrade, then G = 20.
the formula then becomes:
T = 20 - H/100.


at ground level, H = 0 and the formula becomes 20 - 0/100 = 20 degrees centigrade.


at 100 meters, H = 100 and the formula becomes 20 - 100/100 = 20 - 1 = 19 degrees centigrade.


at 200 meters, H = 200 and the formula becomes 20 - 200/100 = 20 - 2 = 18 degrees centigrade.


as can be seen, every additional 100 meters above ground level, the temperature drops 1 degree centigrade.


at 42 km above ground level, H = 42000 and the formula becomes 20 - 42000 / 100 = 20 - 420 = -400 degrees centigrade.


at 5 km above ground level, H = 5000 and the formula becomes 20 - 50 = -30 degrees centigrade.