Question

how much salt must be added to 60 litre of 20% solution of salt to increase it to a 40% solution of salt​

Answer 1

Answer:

20

Step-by-step explanation:

20% of 60 + x = 40% of (60 + x)

12 + x = 24 + 2x/5

3x/5 = 12 => x = 60/3 = 20L

20 L salt must be added