One circuit of a model race car track measures 25 m. Jack’s car took 60 s to complete 5 laps.
Alice’s car took 78 s to complete 6 laps. Sara’s car took 44 s to complete 4 laps.
a) Find the average speed of each car, to the nearest tenth.
b) Which car runs the fastest?
speed = distance/time, so
Jack's speed is 5*25/60 m/s
Alice's speed is 6*25/78 m/s
Sara's speed is 4*25/44 m/s
So now just find the average of those three speeds, and pick the largest.