The difference is that one is fake material that didn't come from our environment and the other did.
HOPE THAT HELPED :)
Nothing it doesn't have to do with reading but with something else
Answer:
the required quantity of solution of 10% is 40 ml
the required quantity of solution of 25% = 80 ml
Explanation:
let the required quantity of solution of 10% be x
and quantity of solution of 25% be (120 - x) ml
Hence, quantity of acid in x ml of 10 percentage solution is
and similarly for 25% solution be ![( 120-x) \times 25\%](https://tex.z-dn.net/?f=%28%20120-x%29%20%5Ctimes%2025%5C%25)
therefore total amount of acid is ![x\times 10\% + ( 120-x) \times 25\%](https://tex.z-dn.net/?f=x%5Ctimes%2010%5C%25%20%2B%20%20%28%20120-x%29%20%5Ctimes%2025%5C%25)
we need total solution of 120 ml of 20% so we have
![x\times 10\% + ( 120-x) \times 25\% = 120 \times 20\%](https://tex.z-dn.net/?f=x%5Ctimes%2010%5C%25%20%2B%20%20%28%20120-x%29%20%5Ctimes%2025%5C%25%20%3D%20120%20%5Ctimes%2020%5C%25)
after solving we get
![\frac{x}{10} -\frac{x}{4} = 24 - \frac{120}{4}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B10%7D%20-%5Cfrac%7Bx%7D%7B4%7D%20%3D%2024%20-%20%5Cfrac%7B120%7D%7B4%7D)
solving for x we get
x = 40
therefore ,
the required quantity of solution of 10% is 40 ml
the required quantity of solution of 25% = 80 ml
Projection since he is saying they are opiniated