The weight of each of two identical barrels of gasoline is 110 kg, the weight of an empty barrel is 10 kg

The weight of each of two identical barrels of gasoline is 110 kg, the weight of an empty barrel is 10 kg, what is the weight of gasoline in both barrels together?

1. Divide the mass of two barrels with gasoline in half, we get the mass of one barrel with gasoline:
110/2 = 55 kg.
2. Now let us subtract the mass of the empty barrel from one barrel with gasoline, we get the mass of gasoline in one barrel:
55 – 10 = 45 kg.
3. To find how much gasoline is in two barrels, double the mass of gasoline in one barrel:
45 * 2 = 90 kg.
Answer: two barrels contain 90 kg of gasoline.