Question 1205958
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Concentrated acid costing 90 c per litre is diluted with water in the ratio 1:5 by volume. 
The diluted acid is sold at 24 c per litre. What is the percentage profit?
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Let's assume that we bought 1 liter of the concentrated acid at the bying price of 90 cents.


We then diluted it with water in the ratio 1:5 by volume. 
So, we have now 6 liters of the diluted mixture.
Assume that water id for free, i.e. at no charge.

So, we have now 6 liters of the mixture by spending 90 c.


Next, we sold 6 liters of the mixture for 6 * 24 c = 144 c.


We have the profit of  144 c - 90 c = 54 c.


The percentage profit is  {{{54/90}}} = {{{6/10}}} = 0.6 = 60%.


<U>ANSWER</U>.  The percentage profit is 60%.
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Solved.