Round: 133
Shortly after the Scroll Repository pyramid was completed (see the previous Lenny Conundrum), a huge sandstorm swept through the Lost Desert, partially burying the pyramid. In fact, exactly 58% of the surface area of the freshly-painted pyramid was obscured by sand.
How deep, in meters, was the sand that buried the pyramid? Please round to the nearest one-hundredth of a meter. Assume the surface of the sand around the pyramid is perfectly level.
Answer: 22.38 metres
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