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diff --git a/2159/CH3/EX3.11/311.sce b/2159/CH3/EX3.11/311.sce
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index 000000000..f7d5ea541
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+++ b/2159/CH3/EX3.11/311.sce
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+// problem 3.11
+d1=0.05
+d2=0.025
+a1=3.142*d1*d1/4
+a2=3.142*d2*d2/4
+Cd=0.94
+g=9.81
+k=((((a1^2)/(a2^2))-1)*(1-(Cd^2)))/(2*g*(a1^2)*(Cd^2))
+disp(k,"venturimeter constant m-5/s2")