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27 December, 13:19

4. A high school athlete runs 400 m in 52.20 sec. What is his speed in mph?

14100

1110

+1
Answers (1)
  1. 27 December, 13:36
    0
    28,800m/p second

    Explanation:

    Calculate the distance per second so, 400m/50 s = 8m/p second now knowing the speed/hour and knowing an hour has 3,600 seconds, multiply it by 8 then you will get 28,800m/p second, or 28.8km/h
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