JAMB - Geography (2025 - No. 44)
What is the temperature around an aeroplane flying at an altitude of 4000 metres if the temperature on the earth surface is 40 ºC?
66 °C
14 °C
26 °C
12 °C
Explication
Assuming a standard lapse rate of about 6.5ºC per 1000 metres at 4000 metres, the temperature would drop by approximately 26ºC. If the surface temperature is 40ºC, the temperature at 4000 metres would be around 14ºC.