Answer :

Espeon
To find how many gallons in 12 min,
 
36         ?
---- =   -----
12         1
Cross multiply

36x1=36

12x?=36

36/12=3

The unit rate is 3 gallons in 1 minute.

I hope I helped!
Unit rate goes as how much can this go in that so since 3x12=36 its 3