Question $3$: Normally consolidated clay layer $40$ft thick situated

under a pervious layer and on top of a non$-$pervious layer.

From tests we know that $C_v$ is $0\mathrm{.}042f\frac{t^3}{?}$ day, $e_1=1\mathrm{.}24,$ and $e_2=$

$1\mathrm{.}06.$ The effective stress at the layer midpoint is $2$ ksf $,$ and

uniform surcharge of $1$ ksf is applied at the soil surface.

Compute:

a$)$ Final settlement of the layer.

b$)$ Settlement after $300$ days from application of the

surcharge.