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Mathematics 12 Online
OpenStudy (anonymous):

Is this a cross-section problem? A trapezoidal region is defined by the vertices (2, 0), (2, 2), (4, 0), and (4, 4). If a solid is generated by revolving the region about the x-axis, what is the volume of the solid? I have no clue where to start.. can anyone give me a clue?

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