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+clc
+//Given that 
+c = 3e8 // speed of light in m/s
+v = 0.99 * c  // velocity of particle
+proper_time = 2.2e-6 // proper mean life time of mesons
+// sample problem 19 page No. 230
+printf("\n \n\n # Problem 19 # \n")
+printf("\n Standard formula used \n t = t_o /sqrt ( 1- (v/c)^2)")
+t = proper_time / sqrt (1 - (v / c)^2) // calculation of time period
+d = v *t// calculation of Distance travelled by particle
+printf ("\n Distance traveled by particle is %e m.",d )