For a dry cohesionless infinite slope, the ratio of resisting to driving shear is $FS=\tan\phi/\tan\beta$. Thus $FS=\tan30^\circ/\tan25^\circ=1.23813$,or **1.24**. Unit weight and depth cancel because cohesion is zero.
More Soil Mechanics questions
GATE 2021 AG Q37– An annular soil-shear device has inner/outer diameters240/300 mm. Soil failure torque50 N…
GATE 2021 AG Q41– A wet sandy-clay loam sample has mass135 kg, wet density1.8 g/cm³,gravimetric water18%,and…
GATE 2026 AG Q57– A homogeneous earthen embankment retains water 12 m deep. Crest width is 3 m,…
GATE 2025 AG Q47– An undisturbed soil sample has volume 100 cm³ and void ratio .60. Oven drying reduces mass…
GATE 2024 AG Q57– A constant-head permeability sample is 70 mm in diameter and 100 mm long. Head loss is 80…