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+//Fluid Systems - By - Shiv Kumar
+//Chapter 11- Centrifugal Pumps
+//Example 11.16
+//To Determine Minimum Starting Speed of the Pump.
+
+       clc
+        clear
+
+//Given Data:-
+         Di=200;       //Diameter of Impeller at Inlet, mm
+         Do=400;        //Diameter of the Impeller at Outlet, mm
+         Hm=25;        //Manometric Head, m
+
+//Data Used:-
+         g=9.81;       //Acceleration due to gravity, m/s^2
+
+
+//Computations:-
+       Di=Di/1000;           //m
+       Do=Do/1000;         //m
+    
+      uo_by_Nmin=%pi*Do/60;      // uo/Nmin
+      ui_by_Nmin=%pi*Di/60;      // ui/Nmin
+            
+     //Minimum Starting Speed of The Centrifugal Pump, Nmin 
+         Nmin=sqrt(2*g*Hm/(uo_by_Nmin^2-ui_by_Nmin^2));      //rpm 
+            
+
+
+//Results:-
+      printf("The Minimum Starting Speed of the Centrifugal Pump, Nmin =%.f rpm \n",Nmin )    //The answer vary due to round off error
+
+