Nellie runs the length of a 100-yard football field in a time of 20 seconds.Her average running speed is
A)1/2 yard/second.
B)5 yards/second.
C)50 yards/second.
D)not enough information

Question

Quizplus · Accepted Answer

To find the average running speed, we need to divide the total distance by the time taken.

Total distance covered by Nellie = 100 yards 
Time taken by Nellie = 20 seconds

Average running speed = Total distance ÷ Time taken

= 100 yards ÷ 20 seconds

= 5 yards/second

Hence, the correct answer is B) 5 yards/second.

Nellie Runs the Length of a 100-Yard Football Field in a Time