In a coastal aquifer, the freshwater table is 2 m above mean sea level. Assuming the standard densities for freshwater (1.000 g/cm3) and saltwater (1.025 g/cm3), what is the approximate depth of the freshwater–saltwater interface below sea level according to the Ghyben–Herzberg relation?

In hydrogeology and fluid dynamics, the coefficient of permeability is also commonly referred to as:

Using the Ghyben-Herzberg relation, if the freshwater column above sea level is 2 m, what will be the depth of freshwater below sea level? (Take freshwater density ρf = 1.000 g/cm³ and saltwater density ρs = 1.025 g/cm³)