<PRE><B>Question 362533</B>
First we have to compute how many drinks they can mix in a certain time..
Steven can mix 4 drinks/min,Sue can mix 2 drinks/min, and Jack can mix (4/3)drinks/min 

After then we will compute how much time it will take for 20 drinks such that;

[4dr/min + 2dr/min + (4/3)dr/min]*t = 20 dr
[(22/3)dr/min]*t = 20 dr

So that t=30/11 min

RF.



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