Calculate what the air temperature is equal to at the top of a mountain with a height of 1500m

Calculate what the air temperature is equal to at the top of a mountain with a height of 1500m, if at its foot it is +20. At what altitude will the air temperature be +14?

1. For every kilometer of climb, the air temperature drops by 6 ° C. This means that with a rise of 1500 m, the air temperature will drop by 1.5 km × 6 ° C = 9 ° C. The temperature at the foot was +20, so at the top +20 – 9 = + 11 ° C.
2. The temperature + 14 ° C was at an altitude of 1000 m, i.e. 1 km, since the air temperature, which was at the foot (+ 20 ° C), decreased by 6 ° C and became 14 ° C, and a decrease of 6 ° C is equal to an increase of 1 kilometer.
Answer: + 11 ° C; 1000 m.