Can someone answer my recent question please?

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

Find x & pleeeeaaaassseeee me !

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?