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diff --git a/1928/CH4/EX4.15.23/ex_4_15_23.sce b/1928/CH4/EX4.15.23/ex_4_15_23.sce
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+//Chapter-4,Example4_15_23,pg 4-38
+
+d=7.23*10^3                             //density
+
+Y=11.6*10^10                            //Young's modulus
+
+n=20*10^3                               //frequency of wave
+
+k=1                                     //consider 1st harmonic
+
+l=(k/(2*n))*sqrt(Y/d)                   //arranging formula of natural frequency
+
+printf("length =")
+
+disp(l)
+
+printf("meter")
+\ No newline at end of file