Units and Measurements Part 2

The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to 10 divisions of vernier scale. The shortest division on the main scale is equal to 1‌mm. The main scale reading is 2‌cm and second division of vernier scale coincides with a division on main scale. If mass of the sphere is 8.635g, the density of the sphere is: