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3 years ago

A hospital needs 40 L of a 10% solution of

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

7 0

Answer:

Step-by-step explanation:

i didnt exactly answer this but i found someone who did

(pasted) i still hope it helps

Let x and (40L-x) represent the 20% and 4% solutions respectively

Mixing the 20% and 1% to form 40L of 15% solution

.20x + .04(40L-x) = .15*40L

.16x = .11*40L

x = .11*40L/.16

x = 27.5L, the amount of the 20% solution.

12.5L,the amount of the 4% solution (40L - 27.5L)

CHECKING our Answer

.20*27.5L + .04*12.5L = 5.5L + .5L = 6L = .15*40L

Which tells us incidentally there is 6L of disinfectant in the final solution.

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Answer:

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