how long would it take to fabricate this hollow pyramid using fdm? the square base has a side length of and the pyramid is tall. the interior cavity is also a pyramid with a square base of sides and a height of . assume the extrudate of abs and support material both have a cross-section of wide by tall and is dispensed at a rate of . the stage takes to move and it takes to switch between materials. the support material has a volumetric fill ratio of . volume of a pyramid