## Pressure problem(Fluid mechanic)

1. The problem statement, all variables and given/known data

enclosed, thanks for checking

2. Relevant equations

P = ρgh

3. The attempt at a solution

I have try to add up all pressure in the tank
(including gauge pressure, pressure of the oil(ρg*0.5), pressure of the water(ρg*0.8))
but still can't balance out the equation since the answer of part A is 1.4m

also, I don't have any clue about part B

thanks if anyone can give me any help
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 PhysOrg.com physics news on PhysOrg.com >> Is there an invisible tug-of-war behind bad hearts and power outages?>> Penetrating the quantum nature of magnetism>> Rethinking the universe: Groundbreaking theory proposed in 1997 suggests a 'multiverse'
 Recognitions: Homework Help Science Advisor Let's see you working. In terms of depth of water, how much pressure at the bottom of the tank comes from: - The gas above the oil - The oil - The water in the tank? For B: - what is the pressure at the water/Hg boundary? - what height of Hg is that equivalent to?

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