Question

Q32. A solution of 8% boric acid is 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 litre of the 8% solution, how many litres of 2% solution will have to be
added?​

Answer 1

Answer:

HERE IS YOUR ANSWER

Step-by-step explanation:

Let x litres of 2% boric acid solution is required to be added. This resulting mixture is to be more than 4% but less than 6% boric acid. Thus, the number of litres of 2% of boric acid solution that is to be added will have to be more than 320 litres but less than 1280 litres.