An aircraft of mass 
with total wing area 
in level flight at a speed of 720 
The density of air at its height is 
The fractional increase in the speed of the air on the upper surface of its wings relative to the lower surface is (Take g 
)
Text Solution
Verified by ExpertsThe correct answer is:
C
The weight of the aircraft is balanced by the upward force due to the pressure difference.
i.e. 
Let 
are the speed of air on the lower and upper surface of the wings of the aircraft and 
are the pressure there.
Using Bernoulli’s theorem, we get
Or 
Here, 
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