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liberstina [14]
3 years ago
5

How many liters of pure water must be added to how many liters of a 25% bleach solution to make 12 liters of a 15% bleach soluti

on?
has to be in complete sentences
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
3 0

Answer: 4.8 liters

Step-by-step explanation:

Let x liter of water is added with y liter of 25% beach solution.

Thus, According to the question,

x + y = 12  -------(1)

0% of x + 25 % of y = 15 % of 12

25 % of y = 15% of 12

25 y = 15\times 12

y = \frac{180}{25}

y = \frac{36}{5}

Put this value in equation (1),

We get,

x + \frac{36}{5} = 12

x = 12-\frac{36}{5}

x =\frac{60-36}{5}

x =\frac{24}{5}

Therefore, the quantity of water =  x =\frac{24}{5}=4.8\text{ liter}

And, the quantity of 25% bleach solution = y =\frac{36}{5}=7.2\text{ liter}

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