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?5.39.217.76" I- a" D% v! ?; R7 y
A.50
7 w3 O+ V) Z5 J1 a$ T+ N. stvb now,tvbnow,bttvbB.60tvb now,tvbnow,bttvb. |4 c! a% b% T3 y& k
C.65公仔箱論壇, ~) j/ }, x7 N
D.75 |
發表於 2007-9-11 07:38 PM
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