Two 10 cm long aluminium rods and five 8 cm long steel rods are at 5°C temperature and are joined together to form a 60 cm long rod. What is the increase in the length of the joined rod when the temperature is raised at 80°C? (Use a coefficient of linear expansion for aluminium= ( 2.4 × 10^ - 5 K^ - 1 ) and coefficient of linear expansion for Steel ( = 1.2 × 10^ - 5 K^ - 1 ) )