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Neptune Realty

Neptune laid out 1,000 square miles of the surface of the sea in a circle, and sold to Aeolus all that part of it which lies without a concentric circle of one third of the diameter. What is the diameter and how much was sold?

Solution:

Source: A. Flintís System of Geometry and Trigonometry, with a Treatise on Surveying, 1830.