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diff --git a/3035/CH4/EX4.6/Ex4_6.sce b/3035/CH4/EX4.6/Ex4_6.sce
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+
+// part - I
+// Dsa = GMR of phase a in section - I
+// (r'Da1a2)(Da1a2r')^(1/4) = sqrt(r'Da1a2)
+// Da1a2 = sqrt(D^2 + 4d^2)
+printf(" Dsa = sqrt(r * sqrt(D^2 + 4*d^2))")
+
+// Dsb = GMR of phase b in section - II
+// Dsb = sqrt(r * Db1b2)
+// Db1b2 = D
+
+printf(" Dsb = sqrt(rD) ")
+
+// Dsc = GMR of phase c in section - I
+// = sqrt(r'Dc1c2)
+// Dc1c2 = sqrt(D^2 + rd^2)
+printf(" Dsc = sqrt(r * sqrt(D^2 + 4*d^2))")
+
+// part - II
+// Dab = Mutual GMD between phase a and b in section I of the trasportation cycle.
+
+printf(" Dab = sqrt(d * sqrt(d^2 + D^2))")
+printf(" Dbc = sqrt(d * sqrt(d^2 + D^2))")
+printf(" Dca = sqrt(2d * D)")
+
+// part - III
+// GMD for fictitious equilateral spacing
+
+printf ( " Ds = (r)^(1/2) * (D^2 * 4d^2)^(1/6)*D^(1/6)")
+// so the inductance per phase is,
+
+printf(" L = 2 * 10^-4 * log((2^(1/6)*(D^2+d^2)^(1/6) * d^(1/2))/(r^(1/2) * (D^2 + 4d^2)^(1/6))) H/km" )