From the problem, we have the formula :
[tex]V=LWH[/tex]Solving for the value of L :
[tex]\begin{gathered} V=LWH \\ \text{Divide both sides by WH} \\ \frac{V}{WH}=\frac{L\cancel{WH}}{\cancel{WH}} \\ L=\frac{V}{WH} \end{gathered}[/tex]The answer is L = V/WH