Compare the motion of two motorboats. Which motorboat was moving at a lower speed?

 - a motorboat that moved 265kilometers in 10hours
 - a motorboat that moved 505kilometers in 10hours
Look at the distance each motorboat moved and the time it took to move that distance.
One motorboat moved 265 kilometers in 10 hours.
The other motorboat moved 505 kilometers in 10 hours.
Notice that each motorboat spent the same amount of time moving. The motorboat that moved 265 kilometers moved a shorter distance in that time. So, that motorboat must have moved at a lower speed.