Question

Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 4 liters ofsynthetic oil. In order to make 648 liters of Petrolyn oil, how many liters of natural oil are needed?

Answer 1

The amount of natural oil needed for 648 liters of Petrolyn is;

`360\text{ liters}`

Step-by-step explanation:

Given that Petrolyn motor oil is a combination of natural oil and synthetic oil and It contains 5 liters of natural oil for every 4 liters of synthetic oil.

`\begin{gathered} \text{ synthetic oil = 4 liters} \\ \text{Natural oil = 5 liters} \end{gathered}`

For 1 liter of Petrolyn motor oil, the amount of natural oil in it would be;

`(5)/(9)`

So, for 648 liters of Petrolyn motor oil, the amount of natural oil in it would be;

`n=(5)/(9)*648=360`

Therefore, the amount of natural oil needed for 648 liters of Petrolyn is;

`360\text{ liters}`