Problema Solution
Dmitri needs 5 liters of a 43% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid: one is an unlimited supply of the 40% solution and the other an unlimited supply of the 45% solution. How many liters of each solution should Dmitri use?
Answer provided by our tutors
Let
x = liters of the 40% solution
y = liters of the 45% solution
x + y = 5
0.40x + 0.45y = 0.43*5
........
........
x = 2 L
y = 3 L
Dmitri should use 2 liters of the 40% solution and 3 liters of the 45% solution.