Compare the motion of two runners. Which runner was moving at a lower speed?
A: a runner who moved 35miles in 5hours
B: a runner who moved 25miles in 5hours
Look at the distance each runner moved and the time it took to move that distance.
One runner moved 25 miles in 5 hours.
The other runner moved 35 miles in 5 hours.
Notice that each runner spent the same amount of time moving. The runner who moved 25 miles moved a shorter distance in that time. So, that runner must have moved at a lower speed.