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+// problem 3.8
+q=0.08
+d1=0.3
+d2=0.15
+a1=3.142*d1*d1/4
+a2=3.142*d2*d2/4
+h=1.5
+g=9.81
+z=(a1*a2*((2*g*h)^0.5))/(((a1^2)-(a2^2))^0.5)
+Cd=q/z
+disp(Cd,"co-efficient of meter")