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diff --git a/2411/CH4/EX4.7/Ex4_7.sce b/2411/CH4/EX4.7/Ex4_7.sce
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+// Scilab Code Ex4.7: Page-237 (2008)
+clc; clear;
+c = 3e+008;    // Speed of light in vacuum, m/s
+v = 0.9*c;    // Speed of the first particle, m/s
+u_prime = 0.9*c;    // Speed of the oppositely moving second particle, m/s
+u = (u_prime+v)/(1+u_prime*v/c^2);    // Velocity of one particle relative to the other from Velocity addition rule, m/s
+printf("\nThe velocity of one particle relative to the other = %5.3f c = %4.2e m/s", u/c, u);
+
+// Result
+// The velocity of one particle relative to the other = 0.994 c = 2.98e+008 m/s 
+\ No newline at end of file