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?

Linear Inequalities

Miscellaneous Exercise

Ncert Solutions class 11 Linear Inequalities Miscellaneous Exercise
Ncert Solutions class 11 Linear Inequalities Miscellaneous Exercise

Class 11

Linear Inequalities

Miscellaneous Exercise