What is the Critical load of the below given column?
1
\(P = \frac{\pi^2 E I}{l^2}\)
2
\(P = \frac{\pi^2 E I}{(l/3)^2}\)
3
\(P = \frac{\pi^2 E I}{(2l/3)^2}\)
4
\(P = \frac{\pi^2 E I}{(l/3)^2} + \frac{\pi^2 E I}{(2l/3)^2}\)
What is the Critical load of the below given column?