Extracted text: 4. A 30-m steel tape weighing 1.75 kg is of standard length under a pull of 6.00 kg, supported for full length. The tape was used in measuring a line 986.05 m long on smooth level ground under a steady pull of 10 kg. Assuming E = 2.0 x 106 kg/cm? and the unit weight of steel is 7.9 x 103 kg/cm³, determine the following: a) cross-sectional area of the tape, b) correction for increase in tension, c) correct length of the measured line.