Question

The current, 2019, women's world record for the 400-meter run around an oval track is held by Marita Koch, with a time of 47.60 seconds. What was her average speed during this race

Answer 1

v = 8.403 m/s

Step-by-step explanation:

Given that,

The current, 2019, women's world record for the 400-meter run around an oval track is held by Marita Koch, with a time of 47.60 seconds.

Average speed, v = d/t

d = 400 m

t = 47.6 s

So,

`v=(400\ m)/(47.6\ s)\\\\v=8.403\ m/s`

Hence, her average speed during the race is 8.403 m/s.