Problem$(3)$:$-$ The continuous footing below carrying a load of $500k\frac{N}{m}$ and a moment of $80kN.\frac{m}{m}$ counter clookwise. For factor of safety equal $(3)$ calculate the footing size?

$C=20k\frac{N}{m^2}$

${}_s=20k\frac{N}{m^3}$