Final answer:
The ideal number of workers per supervisor varied in ancient Egypt. For pyramid construction, around 20,000 workers were employed over 20 years, according to modern estimates.
Step-by-step explanation:
The ideal number of workers per supervisor during ancient times in Egypt varied depending on the specific task or project. For example, when constructing pyramids, the ancient Greek historian Herodotus recorded that the pyramid of Khufu took around 100,000 workers twenty years to build. However, modern archaeologists believe that a more realistic estimate is around twenty thousand workers over a similar time frame. It's important to note that these workers were not enslaved but likely had a higher standard of living compared to other Egyptians at the time.