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Question
In a direct shear test, the shear stress and normal stress on a dry sand sample at failure are 0.6 Kg/cm² and 1.0 Kg/cm² respectively. The angle of internal friction of the sand will be nearly :
izR;{k drjuh ijh{k.k esa 'kq"d jsr uewus ij foiQyrk ds le; drjuh ruko 0.6 kg/cm2 rFkk lkekU; ruko 1.0 kg/cm2 gSA jsr dk vkarfjd ?k"kZ.k dks.k yxHkx fdruk gksxk \
A.
25°
B.
31°
C.
37°
D.
43°
Answer ( Option B)

31°

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