Problema Solution
A hospital staff mixed a 75% disinfectant solution with a 25% disinfectant solution. How many liters of each were used to make 20 L of a 40% disinfectant solution?
Answer provided by our tutors
let
x = L of the 75% disinfectant solution
y = L of the 25% disinfectant solution
the hospital needs to make 20 L of a 40% disinfectant solution:
x + y = 20
0.75x + 0.25y = 0.40*20
by solving the above system of equations we find:
x = 6 L
y = 14 L
click here to see the step by step solution of the system of equations:
6 liters of 75% disinfectant solution needs to be mixed with 14 liters of 25% disinfectant solution.