What is the temperature around an aeroplane flying at an altitude of 4000 metres if the temperature on the earth surface is 40 oC?

Assessment: WAEC SSCE - Geography - 2023 (Objective) Subject: Geography

Question 1 Report

What is the temperature around an aeroplane flying at an altitude of 4000 metres if the temperature on the earth surface is 40 oC?

Answer Details
Using the environmental lapse rate of 6.5 degrees C per 1000m: temperature decrease = 6.5 x (4000/1000) = 26 degrees C. Final temperature = 40 - 26 = 14 degrees C.

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