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+clc
+//Initialization of variables
+k=1.4
+R=287
+T=249 //K
+v=600 //m/s
+d=0.2 //m
+//calculations
+c=sqrt(k*R*T)
+M=v/c
+Cd=0.62
+rho=47.22*10^3 /(R*T)
+Fd=Cd*rho*v^2 /2 *%pi*d^2 /4
+//results
+printf("Drag = %d N",Fd)