Q. A column of height h with a rectangular cross-section of size a×2a has a buckling load of P. If the cross-section is changed to 0.5a × 3a and its height changed to 1.5h, the buckling load of the redesigned column will be
(A) P/12 (B) P/4 (C) P/2 (D) 3P/4
Ans: P/12
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