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A 5.3 m thick unit of sand lays above a 4.9 m thick unit of clay.The water table is situated within the sand unit, 3

A 5.3 m thick unit of sand lays above a 4.9 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 1859 kg/m3. Determine the effective stress (in kPa) at the base of the clay unit. Provide your answer to 2 decimal places without the units.

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