A barrel of crude oil has a volume of 42 gallons, only approximately 45% of which is processed into gasoline. If your car achieves 37 mi/gal, and you drive 36,000 miles in one year, how many barrels of crude oil are required to run your car for a year?

61.44 barrels of crude oil are required to run your car for a year.
Step-by-step explanation:
A barrel of crude oil has a volume of 42 gallons, only approximately 45% of which is processed into gasoline. This means that the processed gasoline from 1 barrel of crude oil would be
45/100 × 42 = 18.9 gallons
If your car achieves 31 mi/gal, and you drive 36,000 miles in one year, it means that the number of gallons of gasoline that you would require in a year is
36000/31 = 1161.29 gallons of gasoline
Since 1 barrel of crude produces 18.9 gallons of gasoline, then the number of barrels of crude that would produce 1161.29 gallons of gasoline would be
1161.29/18.9 = 61.44 barrels

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