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2 years ago

9

Forty liters of a 60% disinfectant solution are to be mixed with a 10% solution to dilute it to a 20% solution. How much of the

10% solution must be used?

1 answer:

Galina-37 [17]2 years ago

8 0

160 liters, because (40 times .6, plus x times .1, equals 40+x times .2)

24+.1x=8+.2x

16=.1x

x=160

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Step-by-step explanation:

Given

<em /> $Backpack = 18\frac{7}{9}kg$ <em> --- with math book</em>

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<em />

Required

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$Math\ Book = \frac{8 * 169 - 9 * 119}{72}$

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