Problema Solution
How many liters each of a 30% acid solution and a 50% acid solution must be used to produce 70 liters of a 40% acid solution?
Answer provided by our tutors
let
x = the liters of the 30% acid solution
y = the liters of the 50% acid solution
30% of x + 50% of y = 40% of 70 liters
that is
x + y = 70
0.30*x + 0.50*y = 0.40*70
by solving the above system of equations we find
x = 35 liters
y = 35 liters
we should mix 35 liters of the 30% acid solution and 35 liters of the 50% acid solution.