Center of mass

As we saw in the previous problem, whomever worked on the pyramid moved a tremendous amount of stone from the quarries. Let's ignore the effort it took to get the stone from the quarry to the pyramid site, since we don't know the distance, how far they could travel by water vs. cart, etc. and just look at how much effort it took to lift that mass off the ground. To answer this question, we need to know the height of the center of mass of a uniform pyramid with the dimensions of the great pyramid: 150 m high and 230 m on a side. For such a pyramid, how high off the ground is the center of mass in m?

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