The Construction ProcessAccording to estimates, each pyramid took 15 to 30 years to be built. The varying sizes range from 1.2 million to 92 million cubic feet, and due to the primary ingredient being massive limestone blocks, it is understandable that some pyramids took longer than others.
How long would it take to build a great pyramid today?
While the pyramid was originally built by 4,000 workers over the course of 20 years using strength, sleds and ropes, building the pyramid today using stone-carrying vehicles, cranes and helicopters would probably take 1,500 to 2,000 workers around five years, and it would cost on the order of $5 billion, Houdin said, …
Why don’t we know exactly how the pyramids were built?
Considering the pyramids were built more than four thousand years ago, the exact technique of construction remains a mystery and modern-day equipment was not available at the time.