Three equal -length straight rods, of aluminium invar and steel all at 20^(@)C, form an equilateral triangle with hinge pins at the vertices. At what temperature will the angle opposite to the invar rod be 59.95^(@)? alpha_("invar")=0.7xx10^(-6)//C^(@), alpha_("steel")=11xx10^(-6)//C^(@), alpha_("aluminium")=23xx10^(-6)//C^(@)

Three equal -length straight rods, of aluminium invar and steel all at

1.	Three equal -length straight rods, of aluminium invar and steel all at 20^(@)C, form an equilateral triangle with hinge pins at the vertices. At what temperature will the angle opposite to the invar rod be 59.95^(@)? alpha_("invar")=0.7xx10^(-6)//C^(@), alpha_("steel")=11xx10^(-6)//C^(@), alpha_("aluminium")=23xx10^(-6)//C^(@)
Answer» ANSWER :`45.3^(@)C`