Question

6.
A torsion member is fabricated from two concentric thin
tubes. At the ends, the tubes are welded to rigid discs so
that both the tubes can be twisted as a unit. The radius
of the outer tube is 2r and that of the inner tube is r. If
the shear stress developed in the outer tube is T, then the
shear stress in the inner tube will be
(1) T
(2) 0.75 T
125 0.5 T
(4) 0.25 T
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Answer 1

Answer:

the answer is 3 .120.5 T