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+// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
+// Chapter 3-Hydrostatic Forces on surfaces
+// Problem 3.29
+
+//Data given in the Problem
+dens=1000
+g=9.81
+h=10
+b=1
+BC=10
+
+//calculations
+A=BC*1
+H=h/2
+F_x=dens*g*A*H
+F_y=dens*g*integrate('3*y^0.5','y',0,10)
+F=(F_x^2+F_y^2)^0.5
+theta =(atan(F_y/F_x))*180/%pi
+mprintf("The Resultant force is %f kN at an angle of %f degrees \n",F*10^-3,theta)