could you please help me with the formula and how you got your answer

You have two objects made of the same substance. Object 1 is a cube with a mass of 272.1g. You measure the side of the cube using a ruler and find it to be 3.17cm. Object 2 is a sphere with a mass of 136.1g. You find the volume of the sphere using water displacement. The volume of the water in a graduated cylinder initially is 120.0mL, and when the sphere is added the new volume is 135.8mL. Using the length of one side of the cube, the calculated volume of the cube is 31.9cm3. Calculate the density of Object 1, in g/cm3, using this volume