Question $6$

A column $(200$ UC $46\mathrm{.}2)$ is under axial compression. Determine the factored

compression capacity $(N_c).$ Assume effective length $=6\mathrm{.}5m.$ Given: $f_y=300\frac{N}{m}{m}^2.$

Hint: Section $6$ AS$4100$:$2020$

$($a$)1770\mathrm{.}0kN$

$($b$)584\mathrm{.}1kN$

$($c$)525\mathrm{.}7kN$

$($d$)1593\mathrm{.}0kN$

The answer is C$,$ need help with the working out please