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+// Scilab Code Ex4.5: Page-236 (2008)
+clc; clear;
+c = 3e+008;    // Speed of light in vacuum, m/s
+t0 = 2.5e-008;    // Proper life time of pi-meson, s
+t = 2.5e-007;    // MEan life time of pi-meson, s
+// As t = t0/(sqrt(1-v^2/c^2)), solving for v
+v = sqrt(1-(t0/t)^2)*c;    // Velocity of pi meson, m/s
+printf("\nThe velocity of pi meson = %5.3f c = %4.2e m/s", v/c, v);
+
+// Result
+// The velocity of pi meson = 0.995 c = 2.98e+008 m/s 
+\ No newline at end of file