Compare the motion of three motorboats. Which motorboat was moving at the highest speed?

 - a motorboat that moved 410miles south in 10hours
 - a motorboat that moved 200miles east in 10hours
 - a motorboat that moved 45miles east in 10hours
Look at the distance each motorboat moved and the time it took to move that distance. The direction each motorboat moved does not affect its speed.
Notice that each motorboat moved for 10 hours. The motorboat that moved 410 miles moved the farthest distance in that time. So, that motorboat must have moved at the highest speed.