Two paper screens `A` and `B` are separated by a distance of `100m`. A bullet pierces `A` and `B`. The hole in `B` is `10 cm` below the hole in `A`. If the bullet is travelling horizontally at the time of hitting the screen `A`, calculate the velocity of the bullet when it hits the screen `A`. Neglect resistance of paper and air.

Explanation

To solve the problem, we will analyze the motion of the bullet as it travels horizontally and falls vertically under the influence of gravity.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- The bullet travels horizontally and pierces two screens, A and B, which are 100 m apart.
- The hole in screen B is 10 cm (or 0.1 m) below the hole in screen A.

...