Question

The volume expansion coefficient for gasoline is 950 × 10-6/K. Gasoline is sold by volume, usually measured in liters. When would it be most economical to purchase gasoline sold this way?
when the gasoline is cold
when the gasoline is warm
The temperature of the gasoline wouldn't make a difference.

Answer 1

when the gasoline is cold
&
Explanation:
At a low temperature gasoline have smaller volume.
According to this the most economical would be to purchase gasoline when it is cold.