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+//Page Number: 112
+//Example 2.29
+clc;
+//Given
+c=3D+8; //m/s
+fc=9D+9; //Hz
+er=1; 
+er1=4;
+p11=1.841;
+
+//(i) air filled
+a=(p11*c)/(2*%pi*fc*sqrt(er));
+disp('cm',a*100,'Inside diameter if air filled:');
+//(ii) dielectric field
+a1=(p11*c)/(2*%pi*fc*sqrt(er1));
+disp('cm',a1*100,'Inside diameter if dielectric filled:');
+
+//Answers are calculated wrong in book