Answer:

Explanation:
Given that,
Velocity of the airplane, v = 240 m/s
Angle with horizontal, 
The altitude of the plane is 2.4 km, d = 2400 m
Vertical speed of the airplane, 
Horizontal speed of the airplane, 
So, the equation of the projectile for the flare is given by :

On solving the above equation, we get the value of t as:
t = 13.04 seconds
Horizontal distance travelled,


d = 2710.23 m
Let
is the angle with which it hits the target. So,


Hence, this is the required solution.