A box with a height L, and a cross sectional Area A is floating between two fluids of densities p1 and p2. Determine the mass of the box using ho, h1, h2, p1, p2, and A.
The Attempt at a Solution
In the file attached I drew my free body diagram and the image of the box. Solving my FBD I get:
Solving for m:
but with Archimedes principal the answer should be p2(A)(h2)+p1(A)(h1), so what did I do wrong/forget?