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15 March, 22:57

Which is faster rate? 3 Laps in 5 minutes or 4 laps in 7 minutes?

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  1. 15 March, 23:47
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    To solve this, we first have to find an individual rate:

    3/5

    4/7

    For the first one:

    1 lap in 5/3 minutes

    Second one:

    1 lap in 7/4 minutes

    find a common LCD

    5/3 and 7/4

    20/12 and 21/12

    4 laps in 7 minutes is faster
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