A shell is fired from a gun from the bottom of a hill along its slope. The slope of the hill is `prop = 30^@` and the angle of the barrel to the horizontal `beta = 60^@`. The initial velocity `v` of the shell is `21 m s^-1`. Then find the distance of point from the gun at which the shell will fall.

Explanation

To solve the problem of finding the distance from the gun at which the shell will fall on the slope of the hill, we can follow these steps:

### Step 1: Understand the Angles
- We have two angles:
- The slope of the hill, \( \alpha = 30^\circ \)
- The angle of the barrel to the horizontal, \( \beta = 60^\circ \)

### Step 2: Calculate the Angle of Projection
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