Question

A container is lled with two liquids of densities ρ and 2ρ up to heights h and eh respectively. What will be the ratio of the total pressure on the lower face AB and on the upper face BC?

(a) 1 : 1

(b) 3 : 1

(c) 2 : 1

(d) 3 : 2

The question was asked in class test.

I need to ask this question from Hydrostatic Force on Plane Area topic in division Hydrostatic Forces on Surfaces of Fluid Mechanics

Answer 1

The correct answer is (b) 3 : 1

The explanation is: Total liquid pressure on the lamina = F = γyA, where γ = specific weight of the liquid, y = depth of centroid of the lamina from the free surface, A= area of the centroid.