Answer:
10 kg
Step-by-step explanation:
In 3% concentration of 20 kg of seawater, there will be [tex]\frac{20 \times 3}{100} = 0.6[/tex] kg of salt.
So, if it is a 2% solution of seawater,
Then 2 kg salt will be there in 100 kg solution.
So, 0.6 kg salt will be there in [tex]\frac{100 \times 0.6}{2}= 30[/tex] kg of solution.
So, to make a solution from 3% to 2% we have to add (30 - 20) = 10 kg of water with a 20 kg solution. (Answer)
