Posted by Anonymous on .
A boat traveling on the Snake River travels 24 miles upstream in 3 hours. The return trip takes the boat only 2 hours. Find the rate of the boat in still water.

algebra 
Henry,
V1 = d/t = 24 / 3 = 8 mi/h.
V2 = 24 / 2 = 12 mi/h.
Vavg = (V1 + V2) / 2 = (8 + 12) / 2 = 10 mi/h = speed in still water.