Compare the motion of two beluga whales. Which beluga whale was moving at a higher speed?

 - a beluga whale that moved 10miles in 5hours
 - a beluga whale that moved 15miles in 5hours
Look at the distance each beluga whale moved and the time it took to move that distance.
One beluga whale moved 15 miles in 5 hours.
The other beluga whale moved 10 miles in 5 hours.
Notice that each beluga whale spent the same amount of time moving. The beluga whale that moved 15 miles moved a farther distance in that time. So, that beluga whale must have moved at a higher speed.