An eperimenter places a piece of solid metal weighing 270 g. into a graduated cyliner, which she then fills with liquid mercury. After weighing the cylinder and its contents, she remove the solid metal and fills the cylinder with mercury. Shen now finds that the cylinder and its contents weigh 116 grams less than before. The density of mercury is 13.6g/cm^3. What is the density of the solid metal? If someone could help me with this, i have tried to work it out but my answer seems to come out wrong.