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4 May, 19:21

Mei is competing in a remote-control car race. She can complete 15 laps in 24 minutes. Find how long it will take mei to finish 20 laps if she keeps the same speed

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  1. 4 May, 19:50
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    It will take Mei 32 minutes to finish 20 laps

    Step-by-step explanation:

    * Lets explain how to solve the problem

    - Mei is competing in a remote-control car race

    - She can complete 15 laps in 24 minutes

    - We need to find how long she will take to finish 20 laps if she keeps

    the same speed

    ∵ Mei can complete 15 laps in 24 minutes

    - Lets find her unit rate

    ∵ Her unit rate = number of laps : the time of this laps

    ∴ Her unit rate = 15 : 24 = 0.625 lap per minute

    - Now we can use her unit rate to find the time of any numbers of laps

    ∵ She keeps her rate

    ∵ She will finish 20 laps

    ∵ Time = number of laps : her rate

    ∴ Time = 20 : 0.625

    ∴ Time = 32 minutes

    * It will take Mei 32 minutes to finish 20 laps
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