What is the air temperature at an altitude of 3 km, if at the Earth’s surface it is +18 ° С?

With each km, the air temperature decreases by 6 degrees; temperature change:
– 6 ° * 3 = -18 °
temperature at an altitude of 3 km:
-18 ° + 18 ° = 0 °
Answer – 0 ° C

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