Angle of Rotation Between the Ends of a Nylon Bar $3.5 ^ { \circ }$

angle of rotation between the ends of a nylon bar is $3.5 ^ { \circ }$ . The bar diameter is 70 mm and the allowable shear strain is 0.014 rad. The minimum permissible length of the bar is approximately:

A) 0.15 m
B) 0.27 m
C) 0.40 m
D) 0.55 m