An enemy plane is flying horizontally at an altitude of 2 km with a speed of `300 ms^(-1)` An army man with an anti-aircraft gun on the ground sights hit enemy plane when it is directly overhead and fires a shell with a muzzle speed of `600 ms^(-1)`. At what angle with the vertical should the gun be fired so as to hit the plane ?

Explanation

To solve the problem of determining the angle at which the anti-aircraft gun should be fired to hit the enemy plane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Data**:
- Altitude of the enemy plane (h) = 2 km = 2000 m
- Speed of the enemy plane (u) = 300 m/s
- Muzzle speed of the shell (v₀) = 600 m/s
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