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21 November, 03:49

A runner is running a 10 km race. It takes her 17.5 minutes to reach the 2.5 km mark. At that rate, how long will it take her to run the whole race?

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Answers (2)
  1. 21 November, 04:06
    0
    At her current rate it will take here 70 minutes to finish the race
  2. 21 November, 04:14
    0
    time = 70 minutes

    Step-by-step explanation:

    According to the question the whole race is 10 kilometer. It takes her 17. 5 minutes to cover a distance of 2.5 km.

    The rate the runner used to cover the distance of 2.5 km can be computed as follows:

    rate = distance / time

    distance = 2.5 km

    time = 17.5 minutes

    rate = 2.5/17.5

    rate = 0.14285714285 kilometer/minutes

    rate = 0.14285714285 km/min

    Use the rate to calculate for the time the runner used for the whole distance of 10 km

    rate = distance/time

    rate = 0.14285714285 km/min

    distance = 10 km

    rate = distance/time

    cross multiply

    time = distance/rate

    time = 10/0.14285714285

    time = 70 minutes

    time = 70 minutes
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