how many liters of natural oil are needed

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Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains

liters of natural oil for every

liters of synthetic oil. In order to make

  liters of Petrolyn oil, how many liters of natural oil are needed?

Sep 9th, 2015

Thank you for the opportunity to help you with your question!

The first question to ask is: "If you combine 3 liters of natural oil and 4 liters of synthetic oil, how many liters of oil (natural or synthetic) do you have? 

Answer:3 + 4 = 7. 

So, this means that 448 liters of Petrolyn oil must be 3/7 natural and 4/7 synthetic. That is, there are (3/7) * 448 = 3 * 64 = 192 liters of natural and (4/7) * 448 = 4 * 64 = 256 liters of synthetic. Can U check this answer? YES.

192 + 256 = 448! 

 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 9th, 2015

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