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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 : 2.11 :
+// Page number 109
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+d = 3.0                   // Diameter of conductor(cm)
+D_12 = 200.0              // Distance between conductor 1 & 2(cm)
+D_23 = 200.0              // Distance between conductor 2 & 3(cm)
+D_31 = 400.0              // Distance between conductor 1 & 3(cm)
+
+// Calculations
+D_eq = (D_12*D_23*D_31)**(1.0/3)              // Equivalent distance(cm)
+r = d/2.0                                     // Radius of conductor(cm)
+L = (0.5+2*log(D_eq/r))*10**-7                // Inductance/phase/m(H)
+L_mH = L*1000.0*1000.0                        // Inductance per phase per km(mH)
+
+// Results
+disp("PART II - EXAMPLE : 2.11 : SOLUTION :-")
+printf("\nInductance of each conductor per phase per km, L = %.3f mH \n", L_mH)
+printf("\nNOTE: ERROR: Calculation mistake in the textbook")