$1-$A square foundation $2m2m$ is constructed on a soil with property

Saturation unit weight $19\frac{KN}{M^3}$

Frictional angle $=38$

Cohesion of soil $C=65\frac{KN}{M^2}$

Depth of foundation $1\mathrm{.}5m$

Calculate allowable bearing capacity with factor of safety $3$ and general shear failure occur in the soil.