Question

Runner a takes 45s to run 400m

runnerb takes 48 to run the same distance
which runner has a grater average speed??

Answer 1

The answer the runner who took 45 sec to run 400m

Explanation:

let the runner who took 45 sec to run 400m be x

let the runner who took 48sec to run 400m be y

Average speed=Total distance(m)/time taken(s)

A(x)=400/45≈9m/s

A(y)=400/48≈8m/s