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+//Fluid Systems - By - Shiv Kumar
+//Chapter 11- Centrifugal Pumps
+//Example 11.7
+//To Determine the Impeller Speed and Torque produced by it.
+
+       clc
+        clear
+
+//Given Data:-
+         Q=60;       //Discharge, litres/s
+         Ri=75;         //Radius  of the Impeller at Inlet, mm
+         Ro=150;         //Radius of the Impeller at Outlet, cm
+         beta_o=30;     //Vane Angle at Outlet, degrees
+         beta_i=30;     //Vane Angle at Inlet, degrees
+         Ai=0.025;       //Impeller Area at Inlet, m^2
+
+
+//Data Used:-
+         rho=1000;       //Density of water, kg/m^3
+
+
+//Computations:-
+             Q=Q/1000;     //m^3/s
+             Ri=Ri/1000;     //m
+             Ro=Ro/1000;       //m
+
+          Di=2*Ri;       //m
+          Do=2*Ro;      //m
+          Vfi=Q/Ai;         //m/s
+          Vfo=Vfi;
+          ui=Vfi/tand(beta_i);       //m/s
+          N=ui*60/(%pi*Di);        //rpm
+          
+          uo=%pi*Do*N/60;          //m/s
+          Vrwo=Vfo/tand(beta_o);       //m/s
+          Vwo=uo-Vrwo;        //m/s
+          P=rho*Q*Vwo*uo;      //Impeller Power, W
+          Ti=P*60/(2*%pi*N);      //Impeller Torque, N-m
+
+//Results:-
+         printf("Impeller Speed, N=%.2f rpm\n",N)     //The answer vary due to round off error
+         printf("Impeller Torque, Ti=%.2f N-m\n",Ti)     //The answer vary due to round off error
+          
+