What did Archimedes determine after discovering the Archimedes principle?

Archimedes principle : • It states that a body when wholly or partially immersed in liquid experiences an upward thrust which is equal to the volume of the liquid. • Archimedes Principle is also known as the physical law of buoyancy. • Purity of gold in the king's crown, Archimedes determine after discovering the Archimedes principle. • Hydrometer, Ships, and Submarines work on the Archimedes Principle. • A Ship/boat floats on the basis of the Archimedes Principle.