A solid steel shaft of 100 mm diameter and 1.0 m long is subjected to a twisting moment T. This shaft is to be replaced by a hollow shaft having outer and inner diameters as 100 mm and 50 mm respectively. If the maximum shear stress induced in both the shafts is same, the twisting moment T transmitted by hollow shaft must be reduced by

A solid steel shaft of 100 mm diameter and 1.0 m long is subjected to

1.	A solid steel shaft of 100 mm diameter and 1.0 m long is subjected to a twisting moment T. This shaft is to be replaced by a hollow shaft having outer and inner diameters as 100 mm and 50 mm respectively. If the maximum shear stress induced in both the shafts is same, the twisting moment T transmitted by hollow shaft must be reduced by
A.	T/4
B.	T/8
C.	T/16
D.	T/12
Answer» D. T/12

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