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8 March, 19:09

During the Labor Day weekend, Amy and Kathleen each ran in a race. Amy ran in a 5K and completed it in 31 minutes and 15 seconds. Kathleen ran in a half-marathon, which is 21.1 kilometers, and completed it in 2 hours, 11 minutes, and 52.5 seconds.

Let d represent distance in kilometers, r represent the rate, and t represent time in minutes. The proportional relationship

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  1. 8 March, 19:58
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    Velocity=distance/time

    a=5 / (31*60+15) = 5/1875=1/375

    k=21.1 / (2*3600+11*60+52.5) = 21.1/7912.5=1/375

    a=k

    The both ran at the same speed.

    (1km/375s) (3600s/h) = 9.6km/h
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