Simple multiple choice question

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

What is the greater volume 72 quarts or 23 gallons

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab