A solution of boric acid is to be diluted by adding a boric acid solution to it

MATHEMATICS · Subjective · CBSE · Mathematics · Linear Inequalities · Linear Inequalities

Problem

12. 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?