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Mixing drinks |
2009-05-02 |
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samantha pose la question :
If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes and Jack can mix 20 drinks in 15 minutes. How much time will it take all 3of them working together to mix the 20 drinks?
Stephen La Rocque and Claude Tardif lui répond. |
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