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?
, [) Q! `) z! H- h/ U, ^# RA.507 b& v# J0 K- K" @
B.60
! c. v, U4 V! L! E) l/ y" ztvb now,tvbnow,bttvbC.65
. S) Y, a" W, ~& C h5 k# j& }5 tD.75 |
發表於 2007-9-11 07:38 PM
| 
