GATE Civil Engineering
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Two steel columns P (length $L$ and yield strength $f_y=250$ MPa) and Q (length $2L$ and yield strength $f_y=500$ MPa) have the same cross-sections and end-conditions. The ratio of buckling load of column P to that of column Q is

  1. $0.5$
  2. $1.0$
  3. $2.0$
  4. $4.0$
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