The uni-axial compressive strength and modulus of elasticity of a rock...

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The uni-axial compressive strength and modulus of elasticity of a rock sample are 90 MPa and 30 GPa respectively. The stored strain energy per unit volume in kN.m/m³ of the sample at the time of failure is

A. 1.5

B. 140

C. 270

D. 135

Answer: Option D

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