Question

Alaine has 1 gallon of paint. She is going to pour it into a paint tray that measures 10 inches wide, 12 inches long, and 5 cm deep.
(1 gallon = 231 in3, 1 inch = 2.54 cm)

Answer 1

$1\ in=2.54\ cm\ \ \Rightarrow\ \ 1\ cm= \frac{1}{2.54}\ in \ \ \Rightarrow\ \ 5\ cm= \frac{5}{2.54}\ in\\ \\10\ in\ \cdot12\ in\ \cdot 5\ cm=120\cdot \frac{5}{2.54}\ in^3\approx283.5\ in^3\\ \\\\1\ gallon=231\ in^3$