Ex$.6\mathrm{.}31.$ The $T-$section shown in Fig. $6\mathrm{.}53(a)$ is subjected to a shear force of $80\mathrm{.}000$ N at a section. Find the maximum shear stress in the section and show the variation of shear stress in the section.

Area $A=122+122=48c{m}^2.$

$($b$)$