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GEOMETRY The area A of a trapezoid varies jointly as its height and the sum of its bases. If the area is 480 square meters

GEOMETRYThe areaAof a trapezoid varies jointly as its height and the sum of its bases. If the area is 480 square meters when the height is 20 meters and the bases are 28 meters and 20 meters, what is the area of a trapezoid when its height is 8 meters and its bases are 10 meters and 15 meters?

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