Question

How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?

Answer 1

Let x litres of water is required to be added.

Then, total mixture = ( x + 1125) litres

It is evident that the amount of acid contained in the resulting mixture is 45% of 1125 litres.

This resulting mixture will contain more than 25% but less than 30% acid content.

∴30% of (1125 + x ) > 45% of 1125

And, 25% of (1125 + x ) < 45% of 1125

30 % of (1125 + x ) > 45% of 1125

25% of (1125 + x ) < 45% of 1125

∴562.5 < x < 900

Thus, the required number of litres of water that is to be added will have to be more than 562.5 but less than 900.

Comments

It's best among the best answers...
Hats off u

---

Thanks, and you are always welcome to ask any question.