Answer:
![w=(V)/(Ih)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/z9q8e7zc68aq8rsfi2auxk4wapc499rf1s.png)
Explanation:
Since, the volume of rectangular prism is,
![V = lwh-----(1)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ujkzgum1u9g3qhpjf482civ9ux9ob1vgv9.png)
Where, l is the length,
w is the width,
h is the height,
For finding the formula for w, we need to isolate w in equation (1),
Divide both sides of equation (1) by lh,
![(V)/(lh)=w](https://img.qammunity.org/2020/formulas/mathematics/middle-school/u3lu012ky1ycok91nszrg71b687p0fbuo1.png)
Hence, the formula to find the width, when V, I and h are given, is,
![w=(V)/(Ih)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/z9q8e7zc68aq8rsfi2auxk4wapc499rf1s.png)