Compare the motion of two speedboats. Which speedboat was moving at a higher speed?

 - a speedboat that moved 180miles in 5hours
 - a speedboat that moved 285miles in 5hours
Look at the distance each speedboat moved and the time it took to move that distance.
One speedboat moved 285 miles in 5 hours.
The other speedboat moved 180 miles in 5 hours.
Notice that each speedboat spent the same amount of time moving. The speedboat that moved 285 miles moved a farther distance in that time. So, that speedboat must have moved at a higher speed.