How much is one barrel of oil approximately equal to?
- A131 litres
- B159 litresCorrect
- C257 litres
- D321 litres
Explanation
The correct answer is B because a standard barrel of oil used in the international petroleum industry is defined as exactly 42 US gallons. When converted to the metric system, 42 US gallons is approximately equal to 158.987 litres, which is rounded to 159 litres for general measurements and trade purposes. This measurement has been the global industry standard since the late 19th century.
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