You have 30 L of a liquid. How many gallons is this?

1 Answer
anor277
Mar 5, 2017

#"1 US Gallon"# #-=# #3.785*L#

#"1 Imperial Gallon"# #-=# #4.546*L#

Explanation:

And #30*L# #-=# #(30*cancel"L")/(3.785*cancel"L"*"gallon"^-1)#

#~=8*"gallon"#.

The difference between US and Imperial gallons is one reason why we should adopt the metric system. One gallon will mean a different thing to me, living in Blighty, than to you, presumably living in the States. Imagine you and I were trying to trade gasoline. Would I be happy if I got less than #4*L*"gallon"^-1#? (Of course gasoline is commonly sold in #"barrels"#, and here this volume specifies #42*"US gallons"#.)

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