Compare the motion of two mountain bikers. Which mountain biker was moving at a higher speed?

 - a mountain biker who moved 95miles in 10hours
 - a mountain biker who moved 185miles in 10hours
Look at the distance each mountain biker moved and the time it took to move that distance.
One mountain biker moved 185 miles in 10 hours.
The other mountain biker moved 95 miles in 10 hours.
Notice that each mountain biker spent the same amount of time moving. The mountain biker who moved 185 miles moved a farther distance in that time. So, that mountain biker must have moved at a higher speed.