Answer :
[tex]S=6Lw+6wh+5hL[/tex]
[tex]S-6Lw=6wh+5hL[/tex]
[tex]S-6Lw=h(6w+5L)[/tex]
[tex]h=\frac{s-6Lw}{6w+5L}[/tex]
[tex]S-6Lw=6wh+5hL[/tex]
[tex]S-6Lw=h(6w+5L)[/tex]
[tex]h=\frac{s-6Lw}{6w+5L}[/tex]