From a pint on the ground at a distance `15 m` from the foot of a vertical wall, a ball is thrown at an angle of ` 45^(@)` which just clears the top of the wall and afterwards strikes the ground at a distance ` 5 m` on the other side. Find the height of the wall.

Explanation

To solve the problem step by step, we will analyze the projectile motion of the ball thrown at an angle of 45 degrees.

### Step 1: Understand the Problem
We have a ball thrown from a point on the ground at a distance of 15 m from a vertical wall. The ball is thrown at an angle of 45 degrees and just clears the top of the wall before landing 5 m beyond the wall. We need to find the height of the wall.

### Step 2: Determine the Total Horizontal Range
The total horizontal distance covered by the ball is the distance to the wall plus the distance beyond the wall:
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