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A tapered bar of length L with diameter D at the base and having specific is suspended freely under its own weight. The elongation

A tapered bar of length L with diameter D at the base and having specific ρ is suspended freely under its own weight. The elongation of the bar will be

(A) ρL³ /6E

(B) ρL³ /E

(D) ρL³ /2E

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