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+// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
+// Chapter 3-Hydrostatic Forces on surfaces
+// Problem 3.32
+
+//Data given in the Problem
+dens=1000
+g=9.81
+h=6
+theta1=30
+w=5
+l=2.5/cos(theta1/180*%pi)
+theta=120
+H1=4
+H2=2
+
+//calculations
+A1=H1*l
+h1=H1/2
+F1=dens*g*A1*h1     //f1 acts at H1/3 from bottom
+A2=H2*l
+h2=H2/2
+F2=dens*g*A2*h2     //F2 acts at H2/3 from bottom
+F=F1-F2
+//equating moment of forces,
+x=(F1*H1/3-F2*H2/3)/F
+//Also,,P=F/(2sin theta)
+P=F/(2*sin (theta1/180*%pi))
+//We know thta R_T+R_B=R   and R=P
+R=P
+//Taking movement of honge reactions;R_T*6+R_B*0=R*1.55
+R_T=R*1.55/6
+R_B=R-R_T
+mprintf("The reaction on the top hinge is %f N and on the bottom hinge is %f N \n",R_T,R_B)