A 50-mm diameter cylinder is made of a brass for which the stress-strain diagram is as shown. Knowing that the angle of twist is 5 in a 725-mm length, determine by approximate means the magnitude 7 of torque applied to the shaft. T (MPa) 100 80 60 40 20 0 0.001 0.002 0.003 d = 50 mm 725 mm The magnitude 7 of torque applied to the shaft is KN-m.