Question

the distances and times of three runners are shown below. which runner had the fastest average speed? a. runner a b. runner b c. runner c d. all three runners had the same average speed.

Explanation:

Step1: Recall speed formula

Speed $v=\frac{d}{t}$, where $d$ is distance and $t$ is time.

Step2: Calculate speed of Runner A

$v_A=\frac{270}{9}= 30$ m/s

Step3: Calculate speed of Runner B

$v_B=\frac{200}{10}=20$ m/s

Step4: Calculate speed of Runner C

$v_C=\frac{240}{8}=30$ m/s

Answer:

D. All three runners had the same average speed.