(Solved): A point load P=2000kP is acting at point A as shown in the figure. Point B is at a distance x=3m ...

A point load $P=2000\mathrm{kP}$ is acting at point $A$ as shown in the figure. Point $B$ is at a distance $x=3\mathrm{m}$ and $y=4\mathrm{m}$. Unit weight of soil is $16\mathrm{kN}/{\mathrm{m}}^3$. Compute the total stress at point $B$ at a depth of $6\mathrm{m}$ using Westergaard's Equation. 4. A rectangular raft of size $30\times 12$ $\mathrm{m}$ founded at a depth of $2.5\mathrm{m}$ below the ground surface is subjected to a uniform pressure of $150\mathrm{kPa}$. Assume the center of the area is the ofigin of coordinates $(0,0)$, and the corners have coordinates $(6,15)$. Calculate the stresses at a depth of $20\mathrm{m}$ below the foundation level by the methods of (a) Boussinesq, (b) Westergaard at coordinated of $(0,0),(0,15),(6,0),(6,15)$ and $(10,25)$. Neglect the effect of foundation depth on the stresses.