Why are there 42 gallons in a barrel?

Related questions

1. What is the difference between light crude and heavy crude?
2. Why do crude oil prices fluctuate?
3. How many Litres of petrol can a barrel of crude oil produce?
4. How much diesel is produced from a barrel of crude oil?
5. What is difference between Brent crude and WTI crude?
6. How many Litres is a barrel of diesel?
7. What is the difference between Brent crude and light crude?
8. How many Litres of petrol are in a barrel of crude oil?
9. Where is WTI traded?
10. How many Litres make a barrel?

Tags

1. #smaller
2. #gallons
3. #barrels
4. #profitable
5. #market
6. #transport
7. #filled
8. #gallon
9. #weighed
10. #heavy
11. #barrel
12. #approximately
13. #larger
14. #watertight
15. #pounds