Question

Runner A takes 45 s to run 400 m. Runner B takes 48 s to run the same distance. Which runner has the greater average speed?

A. Runner A

B. Runner B

C. Both have the same average speed.

D. Information is insufficient to determine.

Answer 1

Runner A has the greater average speed.

Step-by-step explanation:

The average speed of a runner is calculated by dividing the total distance traveled by the total time taken. In this case, Runner A traveled 400 m in 45 s, so the average speed is 400 m / 45 s = 8.89 m/s. Runner B traveled the same distance in 48 s, so the average speed is 400 m / 48 s = 8.33 m/s. Therefore, Runner A has the greater average speed since 8.89 m/s is greater than 8.33 m/s.