QUESTION $2$

TOTAL $[15]$

The rigid bar ABCD in Figure $2$ is pinned at $D$ and supported by two vertical rods. The rod at $B$ is made of Bronze $($Area $=950m{m}^2,E_{\text{b}\text{r}\text{o}\text{n}\text{t}\text{e}}=83$GPa $),$ and the road at $C$ is made of Steel Area $=400m{m}^2,$ Esteel $($:$=200$GPa