Calculate time taken for consolidation in actual layer, Civil Engineering

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A clay layer 5 m thick has double drainage. It was consolidated under a load of 127.5 kN/m2. The load is enhanced to 197.5 kN/m². The coefficient of volume compressibility is 5.79 × 10-4 m2/kN and value of k = 1.6 × 10-8 m/min. Determine total settlement and settlement at 50% consolidation. If the test sample is 2 cm thick and attains 100% consolidation in 24 hours, what is the time taken for 100% consolidation in the actual layer?

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