1.

A manufacturer has 600 litres of a 12 percent solution of acid. How many litres of a 30 percent acid solution must be added to it so that the acid contect in the resulting mixture will be more than 15 percent but less than 18 percent?

Answer»


Answer :the NUMBER of litres of the 30% solution of acid will have to be more than 120 litres but LESS than 300 litres.


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