The solid cylinders $AB$ and $BC$ are bonded

together at $B$ and are attached to fixed support

at $A.$ Knowing that the modulus of rigidity is

$3\mathrm{.}7{10}^6$ for aluminum and

$5\mathrm{.}6{10}^6$ for brass,

Determine the maximum torque $T$

allowable, if the angle of twist at end $C$

not to exceed $2$ degree.

Determine the maximum shearing stress

in the aluminum $AB$ and brass $BC.$