Answer:
The answer is
6 gallons
Explanation:
In order to solve this question we use ratio and proportion.
From the question
$ 2.50 is the price of one gallon
To find the number of gallons that cost $16.2 , multiply $16.2 by one gallon and divide it by $ 2.50
That's

= 6.48
We have the final answer as
6 gallons
Hope this helps you