What is the temperature around an aeroplane flying at an altitude of 4000 metres if the temperature on the earth surface is 40 oC?
- 26 oC
- 66 oC
-
14 oC
- 12 oC
The correct answer is: C
Explanation
Initial temperature = 40oC
Final temperature = ?
According to lapse rate
1000m ascent = 6.5oC decrease in temp.
4000m =x
4000 = 6.5 x 4=26.0oC
Final temp. = (40o -26o)C=14oC