Question

The pressure of water on the ground floor is 160000 Pa. Calculate the pressure on the fifth floor, at a height of 15 m.

Answer 1

Pressure of water at ground floor = P, = 160000 Pa
Pressure of water at the fifth floor = P₂ =?
Height of fifth floor = h = 15 m
Density of water = ρ = 1000 kgm⁻³
Difference in pressure of water at ground and fifth floor
= P₁ – P₂
Pressure of water due to height (h) = hρg
= P₁ – P₂ = hρg
160000 – P₂= 15 × 1000 × 10
P₂= 160000 – 150000
P₂ = 10000 Pa