Problema Solution
A hospital has 35% saline solution on hand. How much water and how much of this solution should be used to prepare 140ml of a 20% SALINE SOLUTION
Answer provided by our tutors
Let x ml of water be used.
So, (140 - x) ml of the 35% saline solution is used.
Now, 35% * (140 - x) = 20% * 140
0.35 * (140 - x) = 28
49 - 0.35x = 28
0.35x = 49 - 28
0.35x = 21
x = 21/0.35
x = 60
So, 60 ml of water and 80 ml of saline solution should be used.