Extracted text: 8. A 30 m steel tape weighs 12.5 g/m and has a cross sectional area of 0.04 cm². It is of standard length under a pull of 5.5 kg when supported through out. The modulus of elasticity is 2.10 x 10 kg/cm² . When used in the field, it measured a distance of 1,428.35 m, under a constant pull of 8.5 kg with the tape supported at its end points. Determine the correct length of the line.