Q55
From a series of tri-axial tests conducted on some sandstone specimens, the relationship between the major and the minor principal stresses in MPa is found to be σ1 = 100 + 5 σ3. The angle of internal friction in degrees of that sandstone is
A.
38
B.
79
C.
42
AnswerD.
32
Answer: Option C
Solution
Answer: Option C
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