The cast-iron pipe of length L, outer diameter D, and thickness t is subjected to an axi...

The cast-iron pipe of length L, outer diameter D, and thickness t is subjected to an axial compressive P. Calculate (a) the change in length ; (b) the change in outer diameter D; (c) the change in thickness   . Given: D=100 mm, t=10 mm, L=0.4 m, P=150 kN, E=70 GPa, and v=0.3.