A large tank is filled with three liquids of densities ρ, 2ρ and 3ρ up to a height of ^h ⁄ 3 each. What will be the expression for the instantaneous velocity of discharge through a small opening at the base of the tank? (assume that the diameter of the opening is negligible compared to the height of the liquid column)
This question was addressed to me at a job interview.
My question is from Hydrostatic Force on Plane Area topic in division Hydrostatic Forces on Surfaces of Fluid Mechanics