Closed tank and inverted manometer question

[razerangel]

Hey guy this is my first post here. I am looking for a little bit of help with a past paper I've been looking over. I've had a look at it and I am drawing a blank due to being off ill when this was covered in class, if anyone would be so kind as to show me how to get started on this question I would be very greatful.

Homework Statement

A closed cylindrical tank filled with water (pwater= 1000kg/m3) has a hemispherical dome and is connected to an inverted piping system. The liquid in the top of the piping system has a relative density of 0.8 and the remaning parts of the system are filled with water. Given that the pressure gauge reading at A is 60kPa, determine:

i)the pressure in the pipe at B
ii) the equivalent pressure head, in mm of mercury (pmercury = 13,600 kg/m3) at the top of the dome

Thanks in advance if anyone can help me out here :)!

 

[redargon]

Hi and welcome to PF.

Before we can get started, I think a sketch would be helpful so we know where A and B are and any other useful information.