The real answer is 22 or one of the 40s. The closer it is to a sphere the smaller its ratio of surface area to volume is, which helps hold heat. Also the smaller opening at the top of the sphere (compared say to number 25) also helps reduce heat loss.
The real answer is 22 or one of the 40s. The closer it is to a sphere the smaller its ratio of surface area to volume is, which helps hold heat. Also the smaller opening at the top of the sphere (compared say to number 25) also helps reduce heat loss.
This is exactly the correct answer. 22/40 ftw.