3) Two solid cylindrical rods AB and BC are welded together at B and loaded as shown in the figure below. The diameter of rod AB is 45 mm and the diameter of rod BC is 75 mm. Rod AB is made of steel (E=200GPa), and rod BC of brass (E= 105GPa). Determine (a) the total deformation of the composite rod ABC, (b) the deflection of point B. 41 During drilling of 75mm 750 mm B 65 kN 1000 mm 65 kN 45mm P = 55 kN