PROBLEM $2.$I:

A square foundation $(BB)$ has to be constructed $1\mathrm{.}23m$ below the ground surface. Assume that $=$

$16\mathrm{.}5k\frac{N}{m^3},{}_{\text{s}\text{a}\text{t}}=18\mathrm{.}45k\frac{N}{m^3},{}^{\text{'}}=30$ and $c^{\text{'}}=10k\frac{N}{m^2}.$ The water table is $0\mathrm{.}5$ m below

the bottom of the footing. The gross allowable load with $FS=3$ is $662\mathrm{.}7$ kN $.$ Determine the size of

the foundation.