$H{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}s$ use superimporition

$($Thermal tload$)$

$E=200$GPa

$=12\frac{{10}^{-6}}{}C$

$L=200mm$

$A_1=300m{m}^2$

$A_2=450m{m}^2$

$P=36kN$

$($i$)T=?$ so that ${}_1=0$

$($ii$)$ Disflacement at junction $=?$

$($iii$)$ Reactions