If internal radius of a hollow shaft is 0.5 times the external radius, then ratio of torques carried by the hollow shaft and solid shaft of same outer radius and subjected to the same maximum shearing stress, will be

If internal radius of a hollow shaft is 0.5 times the external radius,

1.	If internal radius of a hollow shaft is 0.5 times the external radius, then ratio of torques carried by the hollow shaft and solid shaft of same outer radius and subjected to the same maximum shearing stress, will be
A.	1/16
B.	15/16
C.	3/16
D.	1/2
Answer» C. 3/16