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?% x# g: j' n, h! K0 j
A.505.39.217.76/ O4 A! z7 b5 o: O% ]6 g
B.60
8 L' W8 B; r$ {; w6 [tvb now,tvbnow,bttvbC.65
8 I4 n. H+ }: Z% z( E; d+ x) J5.39.217.76D.75 |
發表於 2007-9-11 07:38 PM
| 
