2. Three bars made of copper, zinc and aluminium are of equal length have cross-section 500, 750 and 1000 square mm respectively. They are rigidly connected at their ends. If this compound member is subjected to a longitudinal pull of 250 KN, estimate the proportional of the load carried on each rod and the induced stresses. Take the value of E for copper = 1.3x10ʻN/mm², for zinc = 1x10' N/mm² and for aluminium =1×10 N/mm².