Answer:
Here's a diagram showing the cylindrical barrel:
```
Outer Diameter (D)
|
|-------------------------
| |
| Thickness of Wall (t) |
| |
|-------------------------
|
__|__
Inner Radius (r_i)
__|__ ^
| | Height (h)
| v
|
```
- Outer Diameter (\(D\)) = 1m
- Thickness of Wall (\(t\)) = 5cm = 0.05m
- Inner Radius (\(r_i\)) = 0.45m
- Height (\(h\)) = 2m
This diagram illustrates the cylindrical barrel with all the specified parameters. If you have any further questions or need clarification, feel free to ask!