(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I have been tasked with finding the angle of twist of the following component:

Hollow tube 40mm diameter, 2mm wall thickness, with a 2mm cut along its length (see image), x=2mm.

2. Relevant equations

Please see attachment for equations.

3. The attempt at a solution

Please see attachment for my attempt.

I calculated this to be 1.70x10^{-8}radians/metre.

This seems very small (incorrect?).

Can anyone spot any obvious errors with the equations/workings out?

Thanks in advance

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# Angle of Twist (Torsion)

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