Question

How much water must be added to 300L of a solution so that it's concentration may change from 25% to 20% ​

Answer 1

Hey mate here is your answer with explanation :

Answer :

75 litres must be added to 300 litters of the 25% solution.

Explanation :

Let x litres of water must be added .

Therefore, 25% of 300=20%(300+x)

⇒75=60+0.2x

⇒0.2x=15

⇒x=75

Therefore, 75 litres must be added to 300 litters of the 25% solution.

Hope it helps.