A toy submarine is fabricated out of a sheet of aluminum of thickness 1 mm and density 2.71 g/cm 3 . Assume that the shape of the sub can be adequately modeled as a cylinder of diameter 8 cm....

A toy submarine is fabricated out of a sheet of aluminum of thickness 1 mm and density 2.71 g/cm³. Assume that the shape of the sub can be adequately modeled as a cylinder of diameter 8 cm. Determine the appropriate length so that the toy is neutrally buoyant when submersed in the bathtub. State any assumptions.