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/mm. A hole of 50 mm diameter is now drilled throughout the length of shaft. To develop a maximum shear stress of 60 N/ mm in the hollow shaft, the torque 'T' must he 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/mm. A hole of 50 mm diameter is now drilled throughout the length of shaft. To develop a maximum shear stress of 60 N/ mm in the hollow shaft, the torque 'T' must he reduced by
A.	T/4
B.	T/8
C.	T/12
D.	T/16
Answer» E.

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