27. (8 pts) For the hollow circular beam shown below, the length is 1 = 15 cm, outer radius is ro - = 3 cm, and inner radius is r = 2 cm. If the torque is T = 150 Nm, determine the shear - stresses, To and T at the outer and inner surfaces in the transverse plane at the supported end. Hint: J= T (r4-ri4)/2 27. (8 pts) For the hollow circular beam shown below, the length is 1 = 15 cm, outer radius is ro - = 3 cm, and inner radius is r = 2 cm. If the torque is T = 150 Nm, determine the shear - stresses, To and T at the outer and inner surfaces in the transverse plane at the supported end. Hint: J= T (r4-ri4)/2