We need to find pressure when h = 85 ft
We know the formula for pressure P = hρg, where h is the height of liquid, ρ is the density of liquid and g is the acceleration due to gravity value.
We have ρ = (0.001h+1.60)slug/[tex]ft^3[/tex] = 515.24 kg/[tex]m^3[/tex]
h = 25.908 m
g = 9.8m/[tex]s^2[/tex]
So pressure, P = 25.908*515.24*9.8 = 13088.61 N/[tex]m^2[/tex]
= 18.97 psi
