Question

How many liters of a 15% sugar solution must be mixed with 5 liters of a 45% sugar solution to give a 20% solution?

Select one:

a.
4 liters

b.
25 liters

c.
30 liters

d.
11 liters

Answer 1

25 liters

Explanation:

15x + 45(5) = 20(x + 5)

15x + 225 = 20x + 100

Simplify

125 = 5x

Divide both sides by 5

25 = x

25 liters