there r 2 groups of worker.. skilled n partially skilled. if both group work togather they nid 30 days to finish the job. if partially skilled worker can oni do 2/3 of the skilled worker did in a day. how many days needed if only partially skilled worker is workin to finish the job?公仔箱論壇! q# {) J- X" A2 I( Q+ d' j" Q
A.50' B& y, i) k: ~
B.60
" |' F$ B0 o1 w3 Q' Htvb now,tvbnow,bttvbC.65
# `* y. k& W# C, l, H9 H9 f/ I9 Pwww.tvboxnow.comD.75 |
發表於 2007-9-11 07:38 PM
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