?A unit of area often used in measuring land areas is the hectare, defined as \(10^{4}
Chapter 1, Problem 46(choose chapter or problem)
A unit of area often used in measuring land areas is the hectare, defined as \(10^{4} \mathrm{~m}^{2}\) . An open-pit coal mine consumes 75 hectares of land, down to a depth of 26 m, each year. What volume of earth, in cubic kilometers, is removed in this time?
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