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+clc;clear;
+//Example 5.2
+
+//given data
+Dtank=3*12;//in inches
+Djet=0.5;
+h0=2;
+h1=4;
+
+//constants used 
+g=32.2;//in ft/s^2
+
+//calculations
+//min - mout = dmCV/dt
+//mout = p*(2*g*h*Ajet)^2
+//mCV = p*Atank*h
+//from these we get dt = Dtank^2/Djet^2 * (dh/(2*g*h)^2)
+t=integrate('Dtank^2/Djet^2*(1/sqrt(2*g*h))','h',h0,h1);
+t=(t/60);//in min
+disp(t,'time taken to drop to 2ft in min')