Why an iron boat can float in water, while an iron cube cannot ?

Explanation

To understand why an iron boat can float in water while an iron cube cannot, we need to analyze the concepts of density and buoyancy.

### Step-by-Step Solution:

1. **Understanding Density**:
- Density is defined as mass per unit volume. It is a measure of how much matter is packed into a given space.
- The formula for density (ρ) is:
\[
...