# The painter

In order for the painter to get the desired color, he must mix green and yellow in a ratio of 4: 7. If it has 28 l of green color, how many liters of yellow color should he add? How many liters of mixed color does he get?

Result

y =  49 l
V =  77 l

#### Solution:

$g=28 \ \text{l} \ \\ \ \\ 4:7=g:y \ \\ \ \\ y=g \cdot \ \dfrac{ 7 }{ 4 }=28 \cdot \ \dfrac{ 7 }{ 4 }=49 \ \text{l}$
$V=g+y=28+49=77 \ \text{l}$

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