Question $31$

Two $\frac{1}{2}13-$inch plates are added to the top and

bottom of a W$18$x$86.$ From the given information,

what is most nearly the moment of inertia of the

built$-$up section?

A$)2,667i{n}^4$

B$)2,067i{n}^4$

C$)1,670i{n}^4$

D$)1,590i{n}^4$