10.27 Design a 3-m-long rod subjected to a tensile load of 67.5 KN. Using a factor of safety of 2.5 based on the yield stress, calculate the required rod diameter if it is to be made of a. steel with a yield stress of 310 MPa. b. aluminum alloy with a yield stress of 240 MPa. 10.16 A 12-in.-diameter structural nickel steel specimen was subjected to a tension test. After rupture it was determined that the 2-in. standard-gage length had stretched to 2.42 in. The minimum diameter at the fracture was measured to be 0.422 in. Compute the percent elongation and percent reduction in area.