Let the length of each cut be x.
Therefore, the following equation holds true:
[tex]4x+3(\frac{1}{2})=20[/tex]Therefore,
[tex]\begin{gathered} 4x=20-\frac{3}{2}=18.5 \\ x=4.625\text{ inches} \end{gathered}[/tex]Therefore, the required length is 4.625
