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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART II : TRANSMISSION AND DISTRIBUTION
+// CHAPTER 2: CONSTANTS OF OVERHEAD TRANSMISSION LINES
+
+// EXAMPLE : 2.9 :
+// Page number 108-109
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+d = 1.8                  // Diameter of conductor(cm)
+D_A_B = 4.0              // Distance between conductor A & B(cm)
+D_B_C = 9.0              // Distance between conductor B & C(cm)
+D_A_C = 6.0              // Distance between conductor A & C(cm)
+
+// Calculations
+D_eq = (D_A_B*D_B_C*D_A_C)**(1.0/3)      // Equivalent distance(cm)
+r_GMR = 0.7788*d/2.0                     // GMR(cm)
+L = 2*10**-4*log(D_eq/r_GMR)             // Inductance per phase(H/km)
+L_mH = L*1000.0                          // Inductance per phase(mH/km)
+
+// Results
+disp("PART II - EXAMPLE : 2.9 : SOLUTION :-")
+printf("\nInductance of the line per phase, L = %.3f mH/km \n", L_mH)
+printf("\nNOTE: ERROR: Calculation mistake in the textbook")