A block of mass $10 \mathrm{kg}$ is suspended through two light spring balances as shown in figure. Then:

(Neglect the mass of spring balance)

 

Three identical vessels $A, B$ and $C$ contain same quantity of liquid. In each vessel, blocks with different densities but same masses are placed as shown in figure. If $F_A, F_B$ and $F_C$ are the total forces acting on the base of vessels $A, B$ and $C$ respectively, then