Answer the question in terms of kN for the last picture no need to do the other ones with the solution.

In problem 2-23, a round tube section 3 mm thick was one of the options to prevent buckling. If all the conditions are the same, but a rectangular section is used instead. What is the new value of Pcr? The dimensions of the rectangular section: X = 0.08 m, Y = 0.31 m, t = 0.003 m Express your answer in units of kN Click Save and s Thickness = 0.003 m Dm=0.2083 m 1 Thickness = 0.003 m Y X