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about 2.3 million limestone stones
Roughly 20 years to build the Pyramid of Giza.
It is estimated that around 20,000 to 30,000 workers, not slaves, were employed to build the pyramid of Giza. These workers were likely skilled laborers, farmers, and craftsmen who were paid for their work. The common misconception of slaves being used to build the pyramids is largely inaccurate.
They used 2.3 million blocks of stone
This is the smallest of the Giza pyramids. Perhaps 5000
cause its great... that's why its called the Great Pyramid of Giza
It depended on the size of the pyramid. The Great Pyramid at Giza is comfortably over two million, with some estimates going up to 3.5 million or greater. Smaller pyramids would take fewer stones, as would pyramids which substituted different building materials.
There are no bricks in Khufu's pyramid but there are some 2.3 million blocks of stone. Most of these block are cut from limestone quarried locally with an average weight of 2.5 tons. There are some granite blocks some of which weigh up to 70 tons.
3
Not so much a single worker but a gang. It is estimated that one stone was laid every two minutes during the working day.
Herodotus was told by his Egyptian guides that it took twenty-years for a force of 100,000 oppressed slaves to build the pyramid.
Estimates vary from 14-20 years for the Great Pyramid. The whole Giza site was developed over a period of approximately 80 years and the reigns of three Pharaohs (Khufu, Khafre and Menkaure).