A solid steel shaft ABC with diameter d = 40 mm is driven at A by a

Question:

A solid steel shaft ABC with diameter d = 40 mm is driven at A by a motor that transmits 75kW to the shaft at 15 Hz. The gears at B and C drive machinery requiring power equal to 50 kW and 25 kW, respectively. Compute the maximum shear stress and angle of twist in the shaft between the motor at A and the gear at C. Assume that G = 75 GPa.