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Aaron bought a set of plastic ice cubes with a mixture of water and air inside.
2 rectangular pyramids are stacked on the bases. The pyramid has a rectangular base of 15 millimeters by 20 millimeters, and a height of 30 millimeters.
What volume of water and air is inside each of the plastic ice cubes?
1,500 millimeters cubed
3,000 millimeters cubed
4,500 millimeters cubed
6,000 millimeters cubed