40 quarts
Explanation
to figure out this we need to know the equivalence
[tex]1\text{ gal=}4\text{ quarts}[/tex]therefore, to convert gal into quarts jus multyply by 4
so
[tex]\begin{gathered} 10\text{gal}=\text{ 10gal}\cdot4(\frac{quarts}{gal}) \\ 10\text{gal}=40\text{ quarts} \end{gathered}[/tex]so, the answer is
40 quarts
I hope this helps you