Josie is running her first cross country meet. The race is a distance of 5 km and she has set a goal to finish the race in 21 minu

Question

Josie is running her first cross country meet. The race is a distance of 5 km and she has set a goal to finish the race in 21 minutes. She must run at a speed of to meet this goal.

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Kiệt Gia 4 years 2021-07-25T14:06:53+00:00 1 Answers 8 views 0

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  1. bonexptip
    0
    2021-07-25T14:08:36+00:00
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    Answer:

    3.97 m/s

    Explanation:

    Speed is defined as the distance covered per unit time. Therefore, s=d÷t=d/t

    Where d is distance and t is time

    Given distance of 5 km and time of 21 minutes the speed would be given by dividing 5 km by 21 min. However, speed is expressed as km/h or m/s or miles per hour etc. So we nees to get our speed in one of these standard units.

    Going for m/s

    Conversion

    1 km has 1000m hence

    5 km=5*1000=5000m

    1 min has 60 seconds hence

    21 min=21*60=1260 s

    Speed=5000m÷1260s=3.9682539682538 m/s

    Rounded off, s=3.97 m/s

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