A bottle of drink is to be cooled in the refrigerator from 50°C to 4°C. If the bottle is 6-cm diameter and 20 cm long, find out whether it should be layed down vertical or horizontal in order to...

A bottle of drink is to be cooled in the refrigerator from 50°C to 4°C. If the bottle is 6-cm diameter and 20 cm long, find out whether it should be layed down vertical or horizontal in order to achieve high heat transfer.
D=6 cm=0.06 m ; L=20 cm = 0.2 m
Tf= ?K