Answer:
30 liters of solution must be mixed.
Step-by-step explanation:
Given:
Amount of solution (70%) = 20 Liters
Amount of 20% alcohol solution = A
Find:
Amount of 20% alcohol solution to get 40% solution
Computation:
Amount of 20% alcohol solution to get 40% solution :
⇒ 20% (A) + 70% (20) = 40% (A + 20)
⇒ 0.2 A + 14 = 0.4 A + 8
⇒ 14 - 8 = 0.4 A - 0.2 A
⇒ 6 = 0.2 A
⇒ A = 30 Liter
30 liters of solution must be mixed.
