## Elementary Technical Mathematics

$$11.1 \ m.$$
First, we find $w$ by dividing by $l$ as follows $$\frac{w l}{l}=\frac{A}{l} \Longrightarrow w=\frac{A}{l}.$$ Now, by substituting, we have $$w=\frac{A}{l}=\frac{91.3}{8.20}m=11.1 \ m.$$