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Two bars of sifferent materials are of the same size and are subjected to same tensile forces. If the bars have unit elongation in the ratio of 7 : 3, then the ratio of modulii of elasticity of the two materials is

[A].	8 ; 3	[B].	3 ; 8
[C].	64 ; 9	[D].	9 ; 64

Answer: Option A

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