Essence5450 Essence5450 30-01-2018 Mathematics contestada A piece of a chain's length and weight are in proportion. If 320 cm of chain weighs 8 kg, then A) 40 cm of chain weighs 2 kg. B) 80 cm of chain weighs 2 kg. C) 80 cm of chain weighs 4 kg. D) 160 cm of chain weighs 2 kg.