Answer:
[tex]\text{ w= 10 ft}[/tex]Explanation:
Here, we want to get the width of the rectangular prism
For a rectangular prism, the volume is simply the product of the sides of the prism
[tex]V\text{ = l}\times w\times h[/tex]Substituting the values, we have it that:
[tex]\begin{gathered} \text{ 630 = 9}\times7\times w \\ w\text{ = }\frac{630}{9\times7} \\ \\ w\text{ = }\frac{630}{63} \\ \\ w\text{ = 10 ft} \end{gathered}[/tex]