The document describes an object floating first in a fluid with a density of 900 kg/m^3, then 1000 kg/m^3, and finally 1100 kg/m^3. It asks to rank the densities by: a) The magnitude of buoyant force on the object, greatest first (1100, 1000, 900 kg/m^3) b) The amount of fluid displaced by the object, greatest first (900, 1000, 1100 kg/m^3) The buoyant force is equal to the weight of the object and depends on density, while the displaced fluid volume inversely depends on density for equal buoyant forces.