Cross$-$Section C $($I$-$Section$)$

The third cross$-$section to consider is the $"$I$-$section" shown below. The dimensions

are given as:

$b=180mm$

$d=250mm$

$t=10mm$

With reference to the origin shown above, what are the coordinates of the centroid

for this cross$-$section:

$\stackrel{}{x}=$

$mm$

$\frac{?}{\text{b}\text{a}\text{r}}(y)=$

$mm$

What is the maximum and minimum second moment of area about axes passing

through the centroid:

$I_{\text{m}\text{a}\text{x}}=$

$m{m}^4$

$I_{\text{m}\text{i}\text{n}}=$

$m{m}^4$