1.A 4.9 m thick unit of sand lays above a 3.8 m thick unit of clay. The water table is situated within the sand unit, 3

[answerhappygod]

1.A 4.9 m thick unit of sand lays above a 3.8 m thick unit of
clay. The water table is situated within the sand unit, 3 m
below ground surface. The sand has a wet density of 1910
kg/m3 and a saturated density of 2050
kg/m3. The clay has a saturated density of 1806
kg/m3. Determine the effective stress (in kPa) at
the base of the clay unit. Provide your answer to 2
decimal places.
2.Loose sandy soils with a wet unit weight of 103.2 pcf, a
saturated unit weight of 131.8 pcf and a coefficient
of lateral earth pressure of 0.55 are backfilled against a
foundation wall that extends 10 feet below ground. Determine
the total lateral pressure acting against the base of the
foundation wall if the water table is 6.7 feet below surface.
Note the unit weight of water is 62.3 pcf. Answer to the
nearest whole number, no decimal places