Euler’s critical buckling load for a column hinged at both ends is given by:
A(pi^2 * E * I) / (4 * L^2)
B(pi^2 * E * I) / L^2
C(2 * pi^2 * E * I) / L^2
D(4 * pi^2 * E * I) / L^2
Explanation
Euler’s buckling load formula is P_cr = (pi^2 * E * I) / (Le)^2. For both ends hinged/pinned, effective length Le = L, so P_cr = (pi^2 * E * I) / L^2.

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