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+
+clc
+//initialization of variables
+D = 1.9*10^-5 //Diffusion co efficient in cm^2/sec
+k = 2.5*10^-3 // M.T.C in cm/sec
+//Calculations
+Lbyvmax = 4*D/((k^2)*%pi)//sec
+tou = D/k^2 // sec
+//Results
+printf("The contact time is %.1f sec",Lbyvmax)
+printf("\nThe surface resident time is %.1f sec",tou)