Question

7. A 72 L mixture contains milk and water in the ratio 7:5. How much more milk is to be added to the
mixture so that the new ratio of milk and water becomes 9 : 5?
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Answer 1

Answer:

12 litre

Step-by-step explanation:

72 L mixture contains milk and water in the ratio 7:5.

Ratio milk : water = 42 : 30

$\frac{milk}{water} = \frac{42 + x}{30} = \frac{9}{5}$

Let X be the milk added

$x = 54 - 42 = 12$

12 litres of milk should be added