∴ working stress = 5,000/5 = 103 kg/cm2 ; Working tension, T = 102 × 2 = 2,000 kg wt.
Vol. of one metre length of conductor = 2 × 100 = 200 cm3
Wt. of 1 m of material = 8.9 × 200 g or W = 8.9 × 200/1,000 = 1.98 kg-wt.
Total Wt. per metre
Now d = Wl2 /2T = 2.48 × (150/2)2 /2 × 2,000 = 3.5 metre