Problema Solution
How many liters of a 90% acid solution must be mixed with a 30% acid solution to get 480L of a 80%solution?
Answer provided by our tutors
0.90x + 0.30(480-x) = 0.80*480
Multiply by 100 to get:
90x + 30*480- 30x = 80*480
60x = 24000
x = 400 liters (amt. of 90% solution needed