(i) As per Archimede’s principle, the buoyant force on a body is equal to the weight of the fluid displaced by the body.
Weight of solid cylinder = L x A/5 x D x g = F↓
F↑ = Buoyant force = weight of liquid displaced
(ii) Pressure at the bottom of the cylinder = Patmosphere + Pdense liquid + Plight liquid
Pressure due to liquid = Force/Area
Pressure due to buoyancy reaction = Buoyancy reaction force/area = (A/5) LDg/A