SOLUTION: In seawater there is 5% of salt. How many liters of fresh water do you need to add to 30 liters of seawater to get a 1.5% solution of salt?

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Question 1066846: In seawater there is 5% of salt. How many liters of fresh water do you need to add to 30 liters of seawater to get a 1.5% solution of salt?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
In seawater there is 5% of salt.
How many liters of fresh water do you need to add to 30 liters of seawater to get a 1.5% solution of salt?
:
let x = amt of fresh water required
The AMT of the salt remains the same
.05(30) = .015(x+30)
1.5 = .015x + .45
1.5 - .45 = .015x
1.05 = .015x
x = 1.05/.015
x = 70 liters of fresh water
:
:
check solution
.05(30) = .015(100)
1.5 = 1.5