This question already has an answer here:
- Which way does the scale tip? 7 answers
This problem has bothered me for quite some time and I can't solve it. I have even tried to make a construction, but it sometimes tips to the left and sometimes tips to the right :).
When we submerge the body in the water the water pushes it up. That is an action. At the same time the body pushes water down. That is a reaction. So the balance should be maintained.
But, since the water level rises the hydrostatic pressure on the bottom is greater so the right side should go down.
There is another similar problem but it's not the same.