Question 693621: How many liters of each of 20% acid solution and 45% acid solution must be used to produce 50 liters of a 40% acid solution? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of 20% solution needed
Let = liters of 45% solution needed
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given:
(1)
(2)
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(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
(1)
10 liters of 20% solution are needed
40 liters of 45% solution are needed
check:
(2)
(2)
(2)
(2)
(2)
OK
