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Question 123
The ratio of the volumes of water and glycerine in 240cc of a mixture is 1:3. The quantity of water (in cc that should be added to the mixture so that the new ratio of the volume of water and glycerine becomes 2:3 is
Solution
Let's say we added $$x$$ cc of water.
According to previous ratio amount of water in mixture is $$240 \times \frac{1}{4}$$ = 60
So after adding amount of water = $$60+x$$
amount of glycerine = $$240 \times \frac{3}{4} = 180$$
Hence new ratio will be = $$\frac{60+x}{180} = \frac{2}{3}$$
or $$x$$ will be 60.
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