For a sandy soil, the angle of internal friction is 30?. If the major principal stress is 50 kN/m2 at failure, the corresponding minor principal stress will be

For a sandy soil, the angle of internal friction is 30?. If the major

1.	For a sandy soil, the angle of internal friction is 30?. If the major principal stress is 50 kN/m2 at failure, the corresponding minor principal stress will be
A.	12.2 kN/m2
B.	16.66 kN/m2
C.	20.8 kN/m2
D.	27.2 kN/m2
Answer» C.