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+clc ;funcprot(0);
+//Example 2.10
+
+//Initializing the variables
+phi = 30; //30 degree
+h = 1.2 ; // Height of tank
+l = 2; // Length of tank
+
+//Calculations
+function[Theta]=SurfaceAngle(a,phi)
+ Theta = atand(-a*cosd(phi)/(g+a*sind(phi)));
+endfunction
+
+//case (a) a = 4
+disp(tand(SurfaceAngle(4,phi)),"Tan of Angle between surface of fluid and horizontal :");
+disp(180 + SurfaceAngle(4,phi),"ThetaA (degree):");
+
+//Case (b) a = - 4.5
+tanThetaR = tand(SurfaceAngle(-4.5,phi));
+disp(tanThetaR,"Tan of Angle between surface of fluid and horizontal :");
+disp(SurfaceAngle(-4.5,phi),"ThetaR (degree):");
+
+Depth = h - l*tanThetaR/2;
+disp(Depth,"Maximum Depth of tank (m):"); \ No newline at end of file