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18 September, 22:58

Roger can run one mile in 6 minutes. Jeff can run one mile in 4 minutes. If Jeff gives Roger a 1 minute head start, how long will it take before Jeff catches up to Roger? How far will each have run?

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  1. 18 September, 23:23
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    Roger speed 1/6 mile/min

    Jeff speed 1/4 mile/min

    Set Jeff catch Roger at x, time t

    X = 1/6*t

    X=1/4 * (t-1)

    => 1/6*t=1/4 (t-1)

    4t=6t-6

    t=3

    X=1/2
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