A$-7\mathrm{.}14$: A segment of a drive shaft $(d_2=200(mm),d_1=160(mm))$ is subjected

to a torque $T=30kN*m.$ The allowable shear stress in the shaft is $45$ MPa $.$

The maximum permissible compressive load P is approximately:

$($A$)200$ kN

$($B$)286$ kN

$($C$)328$ kN

$($D$)442$ kN