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Question Number 163692 by mathlove last updated on 09/Jan/22

$$$$ A 10 liter bottle filled with a 20% alcohol solution. How much 75% alcohol solution should be added to obtain 45% alcohol solution? a) 1.62 lit b) 1.72 lit. c) 1.82 lit d) 1.92 lit.\n

Answered by MJS_new last updated on 09/Jan/22

$$\frac{10\times 20+x\times 75}{10+x}=45\Rightarrow x\approx 8.33$$

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