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?www3.tvboxnow.com0 E( _( V; d2 h/ }0 V
A.50
5 I! E9 `5 x/ K% eB.60www3.tvboxnow.com5 D( ~- u$ R' d" u6 ~ |
C.65tvb now,tvbnow,bttvb0 [- ?) z4 A2 B5 c8 f! Y& M
D.75 |
發表於 2007-9-11 07:38 PM
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