Compare the motion of three bicycles. Which bicycle was moving at the highest speed?

 - a bicycle that moved 35miles east in 5hours
 - a bicycle that moved 70miles north in 5hours
 - a bicycle that moved 135miles north in 5hours
Look at the distance each bicycle moved and the time it took to move that distance. The direction each bicycle moved does not affect its speed.
Notice that each bicycle moved for 5 hours. The bicycle that moved 135 miles moved the farthest distance in that time. So, that bicycle must have moved at the highest speed.