I have solved this problem a bunch & worked it out. What am i doing wrong. Whats the right andwer to the problem? $\{\begin{array}{c}L=LT\\ b=b_0-L_{\text{t}\text{o}\text{w}}\end{array}$

$=12\mathrm{.}8{10}^{-6}*12*47=>L_{A_1}=0\mathrm{.}1\mathrm{.}4072192m$

$L_{\text{s}\text{t}\text{e}\text{e}\text{l}}={}_{\text{s}\text{t}\text{e}\text{e}\text{l}}*L_{\text{s}\text{t}\text{e}\text{e}\text{l}}*I$

$L_{\text{t}\text{o}\text{l}\text{a}\text{l}}=L_{n,}+L_{\text{s}\text{t}\text{h}\text{e}\text{l}}$

$=\frac{O}{.}\frac{O}{72192}+\frac{O}{.}\frac{O}{O}\frac{?}{18}\frac{O}{48}=\frac{O}{O}\frac{?}{01924}in$

$=\frac{O}{.}24-\frac{O}{.}\frac{O}{O}\frac{?}{9}\frac{O}{24}=b=\frac{O}{.}230976in$

$=>b=6\mathrm{.}231in=230\mathrm{.}98{10}^{-3}$

$L_{\text{t}\text{o}\text{t}\text{e}}=$