While measuring the length of a cubical box, the reading at one end is 3.5 cm and the other end is 9.5 cm. The length of the cubical box is _____ cm.

Explanation

To find the length of the cubical box based on the given readings, follow these steps:

### Step-by-Step Solution:

1. **Identify the Readings**:
- The reading at one end of the cubical box is 3.5 cm (Initial Reading).
- The reading at the other end of the cubical box is 9.5 cm (Final Reading).

2. **Use the Formula for Length**:
- The length of the cubical box can be calculated using the formula:
\[ \text{Length} = \text{Final Reading} - \text{Initial Reading} \]

3. **Substitute the Values**:
- Substitute the readings into the formula:
\[ \text{Length} = 9.5 \, \text{cm} - 3.5 \, \text{cm} \]

4. **Perform the Calculation**:
- Now, subtract the initial reading from the final reading:
\[ \text{Length} = 9.5 \, \text{cm} - 3.5 \, \text{cm} = 6 \, \text{cm} \]

5. **Conclusion**:
- Therefore, the length of the cubical box is **6 cm**.