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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 7: UNDERGROUND CABLES
+
+// EXAMPLE : 7.4 :
+// Page number 212
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+V_l = 132.0         // Line Voltage(kV)
+g_max = 60.0        // Maximum Line Voltage(kV)
+
+// Calculations
+V = V_l/3**0.5*2**0.5     // Phase Voltage(kV)
+d = 2*V/g_max             // Core diameter(cm)
+D = 2.718*d               // Overall diameter(cm)
+
+// Results
+disp("PART II - EXAMPLE : 7.4 : SOLUTION :-")
+printf("\nMost economical diameter of a single-core cable, d = %.1f cm", d)
+printf("\nOverall diameter of the insulation, D = %.3f cm\n", D)
+printf("\nNOTE: Slight change in obtained answer due to precision")