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A solution of 8% boric acid is to be dil...

A solution of `8%` boric acid is to be diluted by adding a `2%` boric acid solution to it.The resulting mixture is to be more than `4%` but less than `6%` boric acid.If we have 640 litres of the `8%` solution,how many litres of the `2%` solution will have to be added.

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A N EXCEL PUBLICATION-LINEAR INEQUALITIES-QUESTION BANK
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