A steel ring of 3.000 cm inside diameter at 20°C is to be heated and slipped over a brass shaft measuring 3.002 cm in diameter at 20°C. After being heated to the desired temperature. the ring and shaft together are cooled by some means such as liquid air, at what temperature will the ring just slip off the shaft?

A steel ring of 3.000 cm inside diameter at 20°C is to be heated and slipped over a brass shaft measuring 3.002 cm in diameter at 20°C. After being heated to the desired temperature. the ring and shaft together are cooled by some means such as liquid air, at what temperature will the ring just slip off the shaft?