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diff --git a/2021/CH3/EX3.4/EX3_4.sce b/2021/CH3/EX3.4/EX3_4.sce
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+//Finding of Total Pressure , Depth of pressure
+//Given
+b=5;
+h=5;
+spgr=0.8;
+rho=800;
+g=9.81;
+y1=(1+(5/3));
+//To Find
+Ig=(b*h^3)/36;
+Ay=(1/2)*b*h;
+P=Ay*rho*g*y1;
+Ycp=(Ig/(Ay*y1))+y1;
+disp("P= "+string(P)+" Newtons");
+disp("Ycp ="+string(Ycp)+" meter");
diff --git a/2021/CH3/EX3.4/Ex3_4.pdf b/2021/CH3/EX3.4/Ex3_4.pdf
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+++ b/2021/CH3/EX3.4/Ex3_4.pdf