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+// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
+// Chapter 2 - Pressure and its measurements
+// Problem 2.21
+
+//Given Data Set in the Problem
+dens=1000
+g=9.81
+h1=0.35
+h2=0.3
+SG=0.8
+
+//calculations
+//pC=pD
+//pC=pA-dens*g*h1.....adn pD=pB-dens*g*h1-dens*g*h2
+pB_pA=SG*dens*g*h2
+mprintf("The difference of pressure between the pipes is %f N/m^2\n",pB_pA)