If Torque, $T=30MNm($anticlockwise$),$ the Torque, angle of twist, $\frac{O}{?}($rad$)$ at $E$ is

Gear ratio $=$ GR and JG is constant $(Nm{m}^2)$

Power at $F=2000MW$ angular velocity, $w=200ra\frac{d}{s}$

$AB=BC=1000mm$

$DE=500mm$

$EF=CG=2000mm$

$\frac{30**{10}^9**2000}{JG}\frac{?}{G{R}^{.a}}$

$\frac{30**{10}^9**1000}{JG}\frac{?}{G{R}^{.b}}$

$\frac{30**{10}^9**2000}{JG}**GR$

$\frac{30**{10}^9**1000}{JG}**GR$