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Cross-section of a column consisting of two steel strips, each of thickness t and width b is shown in the figure below. The critical loads of the column with perfect bond and without bond between the strips are P and P0, respectively. The ration P/P0 is
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Correct Option: B
P α 2 E I
| α z × | × bt3 | 12 |
P α E l1
| α E × | × b(2t)3 | 12 |
| ∴ | = 4 | P0 |
