A base line was measured to be 150 m long with a tape at a field temperature of 27C. the applied pull being 14 kg. The tape was standardised at a temperature of 15C with a pull of 8 kg. If the designated length of the tape is 20 m, weight of 1 cm of tape = 7.86 g, total weight of tape = 0.8 kg. E=2.109 x 10 kg/cm and coefficient of expansion of tape per degree Celsius 11.2 x 10", find the true length of the line