Question

Serenity, Lucy, and Piper hiked for 4 hours. They hiked 1\frac{3}{4}miles each hour for the first three hours. In the fourth hour, they hiked \frac{3}{10}of the total distance that they hiked during the first three hours.

What was the total distance the girls

\frac{31}{40}
\frac{5}{6}
\frac{5}{6}
\frac{33}{40}