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+//Example 4_1
+clc;funcprot(0);
+//Given data
+p=25;// kW
+n=480;// rpm
+h=5;// m
+// d_r=D/d
+d_r=10;
+H=40;// m
+
+//Calculation
+N=n*(1/d_r)*(sqrt(H/h));// rpm
+P=p*(d_r)^2*(H/h)^(3/2);// kW
+n_s=(n*sqrt(p))/h^(5/4);
+N_s=(N*sqrt(P))/(H)^(5/4);
+printf('\n N=%0.0f r.p.m\nP=%0.0f kW\nN_s=%0.0f',N,P,N_s);
+printf('\nThe runner is of propeller type');
+// The answer vary due to round off error