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+// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
+// Chapter 3-Hydrostatic Forces on surfaces
+// Problem 3.4
+
+//Data given in the Problem
+d=3
+A=%pi*d^2/4
+h=4
+g=9.81
+
+//Calculations
+//1)Force on disc
+F=dens*g*A*h
+mprintf("The force on the disc is %f kN\n",10^-3*F)
+
+//2)Torque required
+IG=%pi/64*d^4
+H=(IG/A/h)+h
+T=F*(H-h)
+mprintf("The Torque required to maintain the disc in edulirium is %f Nm ",T)