Beer in cans 160 mm long and 75 mm in diameter is initially at 30°C and is to be cooled in a refrigerator to 2°C. In the interest of maximizing the cooling rate, should the cans be laid horizontally...

Beer in cans 160 mm long and 75 mm in diameter is initially at 30°C and is to be cooled in a refrigerator to 2°C. In the interest of maximizing the cooling rate, should the cans be laid horizontally or vertically in the compartment ? As a first approximation, neglect the heat transfer from ends.