How much is one barrel of oil approximately equal to? (UPSC Prelims 2008)

Question

A standard US oil barrel equals exactly 42 US gallons. Since 1 US gallon is 3.785411784 liters, 42 gallons compute to 158.987 liters, commonly rounded to 159 liters in industry and trade contexts. This metric is universally recognized by organizations like the American Petroleum Institute (API) and EIA. The other options are inaccurate: 131L ≈34.6gal, 257L≈67.9gal, 321L≈84.8gal, not matching the 42-gallon standard.

GKToday Admin · Accepted Answer

159 litres A standard US oil barrel equals exactly 42 US gallons. Since 1 US gallon is 3.785411784 liters, 42 gallons compute to 158.987 liters, commonly rounded to 159 liters in industry and trade contexts. This metric is universally recognized by organizations like the American Petroleum Institute (API) and EIA. The other options are inaccurate: 131L ≈34.6gal, 257L≈67.9gal, 321L≈84.8gal, not matching the 42-gallon standard.

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