As shown below, a C-shaped structural section is directly extruded from a cylindrical aluminum alloy billet whose length = 600 mm and diameter = 80 mm. The strength coefficient and strain hardening exponent of the aluminum alloy are 240 MPa and 0.15, respectively. The die angle = 90, and the Johnson strain equation has constants a = 0.8 and b = 1.5. Determine (a) extrusion ratio, (b) length of the extruded section if the butt remaining in the container at the end of the ram stroke is 30 mm long, and (c) maximum ram pressure. All dimensions are in mm. 40 30 -7 5 9 ram 30 mm extrudedate butt formed