Repeat Prob. 3120 with d = 0.75 in, F = 750 lbf, L = 10 in, and

Question:

Repeat Prob. 3€“120 with d = 0.75 in, F = 750 lbf, L = 10 in, and Di = 2.5 in.
Repeat Prob. 3€“120, A utility hook was formed from a round rod of diameter d = 20 mm into the geometry shown in the figure. What are the stresses at the inner and outer surfaces at section A€“A if F = 4 kN, L = 250 mm, and Di = 75mm?