How much did the mass of the aluminum barrel increase when 200 liters of gasoline were poured into it?

We calculate the mass of gasoline poured into the barrel using the formula:
m = ρ * V, where m is the sought mass of gasoline (kg), ρ is the density of gasoline (we take ρ = 750 kg / m ^ 3), V is the volume of the poured gasoline (V = 200 l = 200 dm ^ 3 = 200 * 10 ^ -3 m ^ 3 = 0.2 m ^ 3).
Let’s calculate the mass of gasoline poured into the barrel:
m = ρ * V = 750 * 0.2 = 150 kg.
Answer: The weight of the aluminum barrel will increase by 150 kg.