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// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
// Chapter 3-Hydrostatic Forces on surfaces
// Problem 3.12
//Data given in the Problem
d=0.6
a=1.5
SG=0.9
dens=1000
g=9.81
//Calculations
dens1=SG*dens
h=a-d
pA=0
pD=dens1*g*h
pB=dens1*g*h+dens*g*d
//In the diagram,DE=pD,BC=pB,FC=pB-pD
//1)Total pressure
F1=(1/2*h*pD)*a
F2=(d*pD)*a
F3=(1/2*d*(pB-pD))*a
F=F1+F2+F3
mprintf("The total pressure is %f N\n",F)
//2) Position of Centre of Pressure
h=(F1*d+F2*(a-d/2)+(F3*(a-d+2/3*d)))/F //Taking moments of all forces
mprintf("The position of centre of pressure is %f m from A ",h)
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