CLO$1(25\mathrm{.}0$ points$)$:

$20$ mm and shaft consists of a pipe AB and solid rod BC $.$ The pipe has an inner diameter of $AB$ is made of Aluminum and $BC$ of Steel

$\backslash$table$[[,$Aluminum,Steel$],[$Modulus of elasticity $($GPA$),70,200],[\backslash$table$[[$Linear coefficient of thermal$],[$expansion $(\frac{1}{}C)$