A composite shaft consists of a steel rod 60 mm diameter surrounded by a closely fitted brass tube shown in Fig. 3. When a torque of 1000 Nm is applied to the overall shaft, it will be shared by the two material. Take C for the steel and brass as 8.4 X 10' N/mm2 and 4.2 X 10' N/mm. Determine: a) The outside diameter of the shaft b) The shear stress in each material c) The common angle of twist (2 marks) (2 marks) (1 mark) Brass- Steel. Fig. 3 T 60 mm