A solid shaft of diameter 100 mm, length 1000 mm is subjected to a twisting moment T. The maximum shear stress developed in the shaft is 60 N/m2. A hole of 50 mm diameter is now drilled throughout the length of the shaft. To develop a maximum shear stress of 60 N/m2 in the hollow shaft, the torque T must be reduced by

A solid shaft of diameter 100 mm, length 1000 mm is subjected to a twi

1.	A solid shaft of diameter 100 mm, length 1000 mm is subjected to a twisting moment T. The maximum shear stress developed in the shaft is 60 N/m2. A hole of 50 mm diameter is now drilled throughout the length of the shaft. To develop a maximum shear stress of 60 N/m2 in the hollow shaft, the torque T must be reduced by
A.	T/4
B.	T/5
C.	T/12
D.	T/16
Answer» E.

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