A manufacturer has 600 litres of a 12% solution of acid. How many litres of a 30% acid…

Mathematics · Class 11 · CBSELinear Inequalities

A manufacturer has 600 litres of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that acid content in the resulting mixture will be more than 15% but less than 18%?
  1. more than 120 litres but less than 300 litres
  2. more than 140 litres but less than 600 litres
  3. more than 100 litres but less than 280 litres
  4. more than 160 litres but less than 500 litres

Answer

(A) more than 120 litres but less than 300 litres

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