Compare the motion of three geese. Which goose was moving at the lowest speed?

 - a goose that moved 780miles west in 10hours
 - a goose that moved 805miles south in 10hours
 - a goose that moved 700miles south in 10hours
Look at the distance each goose moved and the time it took to move that distance. The direction each goose moved does not affect its speed.
Notice that each goose moved for 10 hours. The goose that moved 700 miles moved the shortest distance in that time. So, that goose must have moved at the lowest speed.