Compare the motion of two ships. Which ship was moving at a higher speed?

 - a ship that moved 185miles in 5hours
 - a ship that moved 85miles in 5hours
Look at the distance each ship moved and the time it took to move that distance.
One ship moved 185 miles in 5 hours.
The other ship moved 85 miles in 5 hours.
Notice that each ship spent the same amount of time moving. The ship that moved 185 miles moved a farther distance in that time. So, that ship must have moved at a higher speed.