biết 4,5 lít dầu cân nặng 3,42kg.hỏi 8 lít dầu cân nặng bao nhiêu kg?
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Đỗ Thị Hạnh
We can use the ratio method to solve this problem. The ratio of weight to volume is constant. So, if 4.5 liters of oil weighs 3.42 kg, then the ratio is 3.42 kg / 4.5 liters. Now, we can use this ratio to find the weight of 8 liters of oil. 8 liters * (3.42 kg / 4.5 liters) = 6.08 kg.
Phạm Đăng Hạnh
To find the weight of 8 liters of oil, we can use the concept of unitary method. We know that 4.5 liters of oil weighs 3.42 kg. So, 1 liter of oil weighs 3.42 kg / 4.5 liters = 0.76 kg. Therefore, 8 liters of oil would weigh 8 liters * 0.76 kg/liter = 6.08 kg.
Đỗ Hồng Hạnh
We can set up a proportion to solve this problem. If 4.5 liters of oil weighs 3.42 kg, then 1 liter of oil weighs 3.42 kg / 4.5 liters = 0.76 kg. Now, we can set up the proportion: 4.5 liters is to 3.42 kg as 8 liters is to x kg. Cross-multiplying, we get 4.5 * x = 8 * 0.76. Solving for x, we find that 8 liters of oil weighs x = (8 * 0.76) / 4.5 = 1.35 kg.
Đỗ Bảo Việt
The ratio between the weight and the volume of oil is constant. So, if 4.5 liters of oil weighs 3.42 kg, then 1 liter of oil weighs 3.42 kg / 4.5 liters = 0.76 kg. Therefore, 8 liters of oil would weigh 8 liters * 0.76 kg/liter = 6.08 kg.