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A barrel of oil is used up in two times, 23 kg for the first time and 23 kg for the second time______ Kilogram
23 (1-23), = 23 (13), = 2 (kg). A: there are 2 kg of oil in this barrel
For a barrel of oil, 20% will be used in the first time. For the second time, two fifths will be used. Six kilograms will be used in the two times. How many kilograms is this barrel of oil?
Let this barrel of oil be x liter. 20% x + 0.2 = 8.2 20% x = 8 x = 40 A: this barrel of oil is 40 liters. 8.2-0.2 / 0.2 = 40, which is equal to 40 liters
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