At the surface of the Earth, the air temperature is +20. what will it be at an altitude of 700 m?

For every kilometer of climb, the air temperature drops by 6 ° C. Accordingly, for every 100 meters, the temperature drops by 0.6 ° C. This means that when you climb 700 meters, the temperature will drop by 0.6 ° C × 7 = 4.8 ° C.
We find the temperature at an altitude of 700 meters: + 20 ° C – 4.8 ° C = + 15.2 ° C
Answer: + 15.2 ° C