For equal resistance to crushing and bending the prop should have dia . . . . . . . .
A. $${\frac{1}{3}^{{\text{rd}}}}$$ of the length
B. $${\frac{1}{6}^{{\text{th}}}}$$ of the length
C. $${\frac{1}{9}^{{\text{th}}}}$$ of the length
D. $${\frac{1}{{12}}^{{\text{th}}}}$$ of the length
Answer: Option D
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