How many liters of oil & gas are in a total mixture of 20 liters if the ratio of gas to oil is 15:1

How many liters of oil & gas are in a total mixture of 20 liters if the ratio of gas to oil is 15:1?
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2 Answers

volume=20

gas/oil=15/1

15+1=16

16x=20,

so x=20/16=1.25

gas=1.25*15=18.75

oil=1.25*1     = 1.25
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