A rod is composed of an aluminum section rigidly attached between steel and bronze sections, as shown in the figure. Axial loads are applied at the positions indicated. If P = 35000 lb and the stress...

A rod is composed of an aluminum section rigidly attached between steel and bronze sections, as shown in the figure. Axial loads are applied at the positions indicated. If P = 35000 lb and the stress in the steel, aluminum, and bronze sections are limited to 20 ksi,  28 ksi, and 18 ksi, respectively, determine the safest area considering the maximum stress in the aluminum.

Extracted text: A rod is composed of an aluminum section rigidly attached between steel and bronze sections, as shown in the figure. Axial loads are applied at the positions indicated. If P = 35000 lb and the stress in the steel, aluminum, and bronze sections are limited to 20 ksi, 28 ksi, and 18 ksi, respectively, determine the safest area considering the maximum stress in the aluminum. 4P Steel Aluminum Bronze P 2.5 ft 3 ft 2 ft