Pressure at the bottom of a container

[Spirochete]

Homework Statement

In an open glass container, 0.10 m of oil (rho=850 kg/m^3) floats on top of 0.20 m of water (1000 kg/m^3). What is the pressure at the bottom of the glass?

Homework Equations

(rho)(h)(g)= pressure at a depth of h

The Attempt at a Solution

The only thing I'm not sure of is: for the oil, should I consider h to be o.1 m, or the sum of both heights, making h 0.3?

edit: I also know i have to add in 1 atmosphere at the end

 

[Doc Al]

The only thing I'm not sure of is: for the oil, should I consider h to be o.1 m, or the sum of both heights, making h 0.3?

Each fluid gets its own "height". You'll find the sum of both pressures, not heights.