The value of d2 and d3 are 2.5 m and 2 m respectively and densities for liquids 2 and 3 are 1.8 and 1.3 kg/M3 respectively. What is the density of the liquid 1?

Answer 1

Using the Bernoulli equation, knowing that velocity is zero and there is no pressure difference, you can find your densities. Please see the link for more on the Bernoulli equation:

https://www.princeton.edu/~asmits/Bicycle_web/Bernoulli.html