What is the pressure at the bottom of the water layer?

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SUMMARY

The pressure at the bottom of a water layer beneath a floating oil layer can be calculated using the formula p = p0 + (density)(gravity)(depth). In this scenario, a 0.50 meter thick layer of oil with an assumed density of 850 kg/m³ floats on a 1.20 meter thick layer of water with a density of 1000 kg/m³. The total pressure at the bottom of the water layer is the sum of the pressure due to the water column and the pressure exerted by the oil layer above it. The final pressure can be expressed as a function of the oil density if not specified.

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Homework Statement



A 0.50 meter thick layer of oil floats on a 1.20 meter thick layer of water. What is the pressure at the bottom of the water layer?

Homework Equations



p=p0 + (density)(gravity)(depth)

The Attempt at a Solution



I understand you treat the oil and water separately, as if they were both in separate tanks. Then simply add the results.

The density of the oil is not given so I am not sure how to solve
 
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You will apparently need the density of oil. You could assume a rough value of 850 kg/m3 and 1000 for water for the purposes of the problem until you get clarification, or else solve it generally and give your answer as a function of ρ.
 

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