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+//Fluid Systems - By - Shiv Kumar
+//Chapter 11- Centrifugal Pumps
+//Example 11.17
+//To Find       (a)Manometric Efficiency.         (b)Minimum Starting Speed
+
+          clc
+          clear 
+
+//Given Data:- 
+      Di=1200;          //Inner Diameter of the Impeller,  mm
+      Do=600;           //Outer Diameter of the Impeller, mm
+      N=200;            //Speed, rpm
+      Hm=6;          //Manometric Head,  m
+      beta_o=26;          // Vane Angle at Outlet,  degrees
+      Vfo=2.5;       // Velocity of flow at Outlet, m/s
+
+
+//Data Used: -
+        g=9.81;       //Acceleration due to gravity, m/s^2
+        
+
+//Computations:-
+            Di=Di/1000;         //m
+            Do=Do/1000;        //m
+
+             uo=%pi*Di*N/60;         //Tangential Velocity of Impeller at Outlet, m/s
+             Vwo=uo-Vfo/tand(beta_o);      //m/s
+       
+        //(a)Manometric Efficiency, eta_man
+              eta_man=g*Hm/(Vwo*uo)*100;         //In Percentage
+
+       //(b) Minimum Starting Speed,  Nmin 
+                     Nmin =sqrt(2*g*Hm*60^2/(%pi^2*(Di^2-Do^2)));         //rpm
+
+
+//Results:-
+            printf("(a)Manometric Efficiency =%.2f Percent \n",eta_man)  //The answer vary due to round off error
+            printf(" (b)Minimum Starting Speed, Nmin =%.f rpm",Nmin)  //The answer vary due to round off error
+
+