An unequal angle section $200mm150mm15mm$ is to be used in a truss as a strut of length $4\mathrm{.}5m.$ The cross$-$sectional properties of the section are as follows :

Area $of$ cross$-$section $=5025m{m}^2$

$I_{}=2{10}^{7}m{m}^4$;$I_{rr}=9\mathrm{.}7{10}^{6}m{m}^4$;

$I_{xy}=-8\mathrm{.}3{10}^{6}m{m}^4$

Using the table of permissible compressive stresses given below, determine the safe load on the member.

$\backslash$table$[[$Slenderness Ratio,$100,110,120,130,140,150,160,170,180],[\backslash$table$[[$Permissible compressive$],[$stress MPa$]],80,72,64,57,51,45,41,37,33]]$