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josh16

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## Homework Statement

A hollow shaft has an internal diameter of 72 mm and wall thickness of 24mm is to be used to transmit a power of 90 kW.

what would be the maximum speed of shaft rotation if the shear stress must not exceed 150 MPa ??

## Homework Equations

http://www.amesweb.info/Torsion/CalculationStepsForTorsionalStress.aspx

## The Attempt at a Solution

I got 22.66 rad/s. I am getting stuck at finding the external diameter

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