For the pipe shown $(G=50$GPa $).$ Determine $($a$)$ the torque $T_0,$ required to cause an angle of twist of $2\mathrm{.}29$ degrees, $($b$)$ the angle of twist $($degrees$)$ ant the shear strain in the pipe if the same torque $T_0$ is applied to a solid cylindrical shaft of the same length and cross section area.

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