To find the width of the box, we can use the formula for the volume of a rectangular prism, which is:
\[ \text{Volume} = \text{length} \times \text{width} \times \text{height} \]
Given:
- Volume = 162,000 cm³
- Length = 90 cm
- Height = 40 cm
We can rearrange the formula to solve for the width:
\[ \text{width} = \frac{\text{Volume}}{\text{length} \times \text{height}} \]
Substituting the given values:
\[ \text{width} = \frac{162,000 \text{ cm}^3}{90 \text{ cm} \times 40 \text{ cm}} \]
Calculating the denominator:
\[ 90 \text{ cm} \times 40 \text{ cm} = 3600 \text{ cm}^2 \]
Now substituting this back into the equation for width:
\[ \text{width} = \frac{162,000 \text{ cm}^3}{3600 \text{ cm}^2} = 45 \text{ cm} \]
Therefore, the width of the box is 45 cm.