# Can you explain as well? There's a picture below!

Mar 12, 2018

(C) 27.5% acid

#### Explanation:

In $1$ liter of 40% acid we have $\frac{40}{100}$ liter of acid, so in $15$ liter of 40% acid, we will have

$\frac{40}{100} \times 15 = \frac{600}{100} = 6$ liters of acid.

Similarly, in $1$ liter of 20% acid we have $\frac{20}{100}$ liter of acid, so in $25$ liter of 20% acid, we will have

$\frac{20}{100} \times 25 = \frac{500}{100} = 5$ liters of acid.

Therefore in $15 + 25 = 40$ liters of mix, we have $6 + 5 = 11$ liters of acid

and in $1$ liter, we have $\frac{11}{40}$ liters of acid i.e.

11/40xx100=11xx2.5=27.5% acid and answer is $\left(C\right)$