Question

Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 8 liters of synthetic oil. In order to make 1157 liters of Petrolyn oil, how many liters of synthetic oil are needed?

Answer 1

712 liters

Explanation:

natural:synthetic = 5:8

For every 13 liters of Petrolyn, 8 are synthetic oil. So:

1157/13=89

89 x 8=712 liters of synthetic oil needed ..............