Two thin-walled tubular members made of the same material have the same length, same wall thickness and same total weight and are both subjected to the same torque of magnitude T. If the individual cross-section are circular and square, respectively, as in the figures, the ratios of the shear stress τ , reckoned for the circular member in relation to the square member will be.

Two thin-walled tubular members made of the same material have the sam

1.	Two thin-walled tubular members made of the same material have the same length, same wall thickness and same total weight and are both subjected to the same torque of magnitude T. If the individual cross-section are circular and square, respectively, as in the figures, the ratios of the shear stress τ , reckoned for the circular member in relation to the square member will be.
A.	0.785
B.	0.905
C.	0.616
D.	0.513
Answer» B. 0.905