A series of tri-axial compression tests conducted on sandstone samples reveal the following relationship between major and minor principal stresses σ1 = 50 + 30σ3 [stresses are in MPa)
The cohesion in MPa and angle of internal friction in degrees of sandstone respectively are
A. 14.43, 30.0
B. 14.43, 60.0
C. 0.21, 73.9
D. 0.21, 16.1
Answer: Option A
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