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

 - a speedboat that moved 665miles in 10hours
 - a speedboat that moved 595miles in 10hours
Look at the distance each speedboat moved and the time it took to move that distance.
One speedboat moved 665 miles in 10 hours.
The other speedboat moved 595 miles in 10 hours.
Notice that each speedboat spent the same amount of time moving. The speedboat that moved 665 miles moved a farther distance in that time. So, that speedboat must have moved at a higher speed.