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A cylindrical well of with a height of 20 meters and a radius of 7 meters is dug in a field 77 meters long and 42 meters wide. How much will the
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A trough is 7 meters long,1.5 meters wide, and 1 meter deep. The vertical cross-section of the trough parallel to an end is shaped like an isosceles triangle (with height 1 meters,
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