A bucket gets filled faster at ground floor than at 2nd floor

Due to gravitational Force the water exerts more pressure at "ground floor"  than at "2nd floor".

Explanation:

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

hypostyle hall;