Equilibrium equation

${\mathrm{T}}_1+{\mathrm{T}}_2=\mathrm{T}=1,400 \mathrm{N}-\mathrm{m}$

Compatibility equation

$\frac{{\mathrm{T}}_1{\mathrm{L}}_1}{{\mathrm{J}}_1{\mathrm{G}}_1}=\frac{{\mathrm{T}}_2{\mathrm{L}}_2}{{\mathrm{J}}_2{\mathrm{G}}_2}$

For shaft $\left(1\right)$:

$$\begin{gathered} {\mathrm{L}}_1=1,000 \mathrm{mm} \\ {\mathrm{G}}_1=26 \mathrm{GPa}=26,000 \mathrm{N}/{\mathrm{mm}}^2 \\ {\mathrm{J}}_1=308,102 {\mathrm{mm}}^4 \end{gathered}$$

For shaft $\left(2\right)$:

$$\begin{gathered} {\mathrm{L}}_2=1,000 \mathrm{mm} \\ {\mathrm{G}}_2=38 \mathrm{GPa}=38,000 \mathrm{N}/{\mathrm{mm}}^2 \\ {\mathrm{J}}_2=225,968 {\mathrm{mm}}^4 \end{gathered}$$