Compare the motion of two birds. Which bird was moving at a lower speed?

 - a bird that moved 30kilometers in 5hours
 - a bird that moved 45kilometers in 5hours
Look at the distance each bird moved and the time it took to move that distance.
One bird moved 30 kilometers in 5 hours.
The other bird moved 45 kilometers in 5 hours.
Notice that each bird spent the same amount of time moving. The bird that moved 30 kilometers moved a shorter distance in that time. So, that bird must have moved at a lower speed.