A body weighing 0.3 at full immersion displaces 350 cm³ of liquid. Will it float in water? In kerosene?

Since the volume of displaced water is equal to the volume of the body, the volume of the body is: V = 350 cm ^ 3 = 350 * 10 ^ -6 m ^ 3.
Body density: ρ = m / V, where m is body weight (m = 0.3 kg).
Let’s calculate the density of the body.
ρ = m / V = 0.3 / (350 * 10 ^ -6) ≈ 857 kg / m ^ 3.
A body will float in a liquid if its density is less than the density of the liquid in which it is immersed.
Density of water: ρw = 1000 kg / m ^ 3.
Kerosene density: ρк = 800 kg / m ^ 3.
Since ρ> ρк and ρ <ρв, the body will float in water, and drown in kerosene.