a manufacturer has 600 litres of a 12 percent solution of acid.how many litres of 30 percent acid solution must be added to it so that the acid content in the resulting mixture will be more than 15 percent but less than 18 percent?
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A manufacturer has 600 litres of 12% acid solution. How many litres of 30% acid solution must be added to it so that acid content in the resulting mixture will be more than 15% but less
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