Compare the motion of two buses. Which bus was moving at a higher speed?

 - a bus that moved 265kilometers in 5hours
 - a bus that moved 210kilometers in 5hours
Look at the distance each bus moved and the time it took to move that distance.
One bus moved 265 kilometers in 5 hours.
The other bus moved 210 kilometers in 5 hours.
Notice that each bus spent the same amount of time moving. The bus that moved 265 kilometers moved a farther distance in that time. So, that bus must have moved at a higher speed.