The built$-$up shaft in $($Figure $1)$ is designed to rotate at $450$ rpm $.$

Part A

If the radius of the fillet weld connecting the shafts is r$=13\mathrm{.}2$mm$,$ and the allowable shear stress for the material is $\backslash$tau $\_($allow $)=110$MPa, determine the

maximum power the shaft can transmit.

Express your answer to three significant figures and include the appropriate units.

Figure

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