Example $10\mathrm{.}9$: A rectangular foundation $2m3m,$ transmits a pressure of $360k\frac{N}{m^2}$ to the

underlying soil. Determine the vertical stress at a point $1$ metre vertically below a point lying

outside the loaded area, $1$ metre away from a short edge and $0\mathrm{.}5$ metre away from a long edge.

Use Boussinesq's theory.