Chapter 7, Problem 48RQ

For almost four millennia, the Pyramid of Khufu (aka The Great Pyramid of Giza) was the tallest man-made structure in the world, and it remains the only one of the Seven Wonders of the Ancient World that is still essentially intact. This is a square pyramid, with a base side length (L) of 813 feet [ft]. The volume (V) of the pyramid is 2.946 ×10⁹ liters [L]. The volume (V) of a pyramid with a square base is given by

     $V=\frac{L^{2}H}{3}$

What is the height (H) of the pyramid in units of cubits?