A fighter plane flying horizontally at an altitude of 1.5 km with speed 
passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 
to hit the plane. (Take g = 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Here,
Speed of the plane,
Speed of the shell, 
Let the shell will hit the plane at L after time t if fired at an angle 
with the vertical from O.
For hitting horizontal distance travelled by the plane = horizontal distance travelled by the shell.
i.e. 
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