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+// Scilab code Exa10.10 : : Page-458 (2011)
+clc; clear;
+N_0 = 6.02252e+26;        // Avogadro's constant
+sigma = 3.5e-28;            // Cross section, square metre
+rho = 8.9e+03;                // Nuclear density, Kg per cubic metre
+M = 58;                          // Mass number  
+summation = rho/M*N_0*sigma;    // Macroscopic cross section, per metre
+x = 0.01e-02;                   // Thickness of nickel sheet, metre
+I0_ratio_I = exp(summation*x/2.3026);    // Fractional attenuation of neutron beam on passing through nickel sheet
+printf("\nThe fractional attenuation of neutron beam on passing through nickel sheet = %6.4f", I0_ratio_I);
+
+// Result
+// The fractional attenuation of neutron beam on passing through nickel sheet = 1.0014 
+// Wrong answer given in the textbook