When immersed in a liquid, a buoyant force of 18N acts on a body with a volume of 2 d 3. what kind of liquid is it?

According to Archimedes’ law:
Fa = ρgV, where Fa is the Archimedes force (Fa = 18 N), ρ is the density of the sought liquid, g is the acceleration of gravity (we take g = 10 m / s ^ 2), V is the volume of a body immersed in the liquid (V = 2 dm ^ 3 = 2 * 10 ^ -3 m ^ 3).
Let’s calculate the density of the liquid:
ρ = Fa / gV = 18 / (10 * 2 * 10 ^ -3) = 90 kg / m ^ 3.
Check: kg / m ^ 3 = N / ((m / s ^ 2) * m ^ 3) = (kg * m / s ^ 2) / (m ^ 3 * m / s ^ 2) = kg / m ^ 3.
From the density table for liquids, the density of the engine oil is closest to the result.
Answer: The fluid you are looking for is engine oil.