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2026
There are two chemicals which do not react with each other. A container contains 10 litres of the chemical A. One litre of this chemical is removed from it and one litre of the chemical B is poured. Then one litre of the mixture is removed from the container and one litre of B is poured. If this process of replacing one litre of the mixture by one litre of B is performed once more, then what is the volume of B that is present in the container approximately (in percentage)?
Explanation
After the first replacement, the container has 9 liters of A and 1 liter of B. The second replacement removes 0.1 liters of B (from the 10 liters mixture) and replaces it with 1 liter of B, resulting in 8.9 liters of A and approximately 1.1 liters of B. In the third replacement, this pattern continues, leading to about 2.7 liters of B after three iterations, which is approximately 27% of the total volume.
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