A square footing with width $($B$)$ of $7$ feet, and thickness $(T)$ of $1\mathrm{.}5$ feet will support a column load $(P)$ of $80$

kips. The soil has a unit weight of $120pcf,$ and water is deep at this site. The footing will be buried at a

depth $($D$)$ of $3$ feet below the final grade. Due to settlement considerations, the engineer wants to limit the

net bearing pressure to a maximum of $1000psf$ by lowering the original site grade. Referring to the figure

below, how much cut is needed, to the nearest $\frac{1}{10}ft,$ to achieve this net pressure?