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?* r+ j& k5 V) L2 S1 g7 ~7 \
A.50( \( ?4 m0 J6 ]- Q+ c& s; F5 C
B.60
- E( R5 s6 S! X# s3 w! z5 p: M5.39.217.76C.655.39.217.760 A3 x, C- e. i0 n% ]2 g3 i
D.75 |
發表於 2007-9-11 07:38 PM
| 
