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GATE2016-3-7

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The cross-sections of two solid bars made of the same material are shown in the figure. The square cross-section has flexural (bending) rigidity $I_1$, while the circular cross-section has flexural rigidity $I_2$. Both sections have the same cross-sectional area. The ratio $I_1/I_2$ is

  1. $1/ \pi \\$
  2. $2/ \pi \\$
  3. $ \pi/3  \\$
  4. $ \pi/6 $

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