How many square feet of outdoor carpet will we need for this hole ? A1 72ft and A2 9ft

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

Me with this one question, and i'll upvote the brainliest answer

Don't know how to find x given these segment lengths