A barrel of oil weighs 56.2kg. After half of the oil is used, the barrel weighs 30.2kg. How many kilograms does the barrel weigh?

Suppose the oil tank weighs XKG and the oil weighs ykG!
X+Y=56.2 ①
X+1/2 *Y=30.2 ②
There are ① and ② results
X = 0.2kg
Y = 52kg
So the barrel weighs 0.2kg

A barrel of oil weighs 56.5 kg. After half of the oil is used, the barrel weighs 29.2 kg. How many kg does the barrel weigh?

1 / 2 of oil = 56.5-29.2 = 27.3
Oil before pouring = 27.3 * 2 = 54.6
Barrel weight = 56.5-54.6 = 1.9

A barrel of oil weighs 56 kg in total. After half use, the barrel weighs 30 kg. How much is the empty barrel? How much is the oil?

Oil weight (56-30) * 2 = 52 (kg) barrel weight 56-52 = 4 (kg)

A barrel of oil weighs 56.2kg. If half of the oil is used, the barrel weighs 30.2kg. How many kilograms does the barrel weigh

(56.2-30.2) △ 1 / 2 = 52kg
Barrel weight: 56.2-52 = 4.2kg

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