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+//Example 3.21

+clc;

+clear;

+close;

+format('v',7);

+//Given data :

+r=2;//meter

+l=4;//meter

+A=r*l;//m^2

+xbar=2+r/2;//meter

+w=9.81;//kN/m^2

+PH=w*A*xbar;//kN

+disp(PH,"Horizontal component of resulting Pressure in kN : ");

+PV=2*r*l*w+%pi*r^2/4*l*w;//kN

+disp(PV,"Verticalal component of resulting Pressure in kN : ");

+IG=(l*r^3)/12;//in m^4

+h_bar=IG/A/xbar+xbar;//in meter

+disp(h_bar,"Position of centre of horizontal component of pressure in meter : ");

+x=(2*r+%pi*r^2/4*(4*r/3/%pi))/(2*r+%pi*r^2/4);//meter

+P=sqrt(PH^2+PV^2);//kN

+disp(P,"Resultant pressure in kN : ");

+theta=atand(PV/PH);//degree

+disp(theta,"Direction of resultant pressure in degree : ");