Question

5 litres of surf water contains 30% surf is mixed with 8 litres of surf water containing 25% surf. If 1000 cmº surf is also added to the mixture, then what is the
quantity of surf in the resultant mixture?
A.
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Answer 1

Answer:

In the initial mixture,

Amount of milk = 30 × 80/100 = 24

Amount of water = 30 - 24 = 6

Ratio of milk and water in the initial mixture is

80 : 20 = 4 : 1

Let amount of water to be added is x to make the ratio 1 : 4

Then, 24 : 6+x = 1 : 4

\begin{lgathered}\frac{24}{6 + x} = \frac{1}{4} \\ x = 96 - 6 = 90\end{lgathered}

6+x

24

=

4

1

x=96−6=90