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?* n2 |1 k) l# t2 |* [8 Z, u
A.50tvb now,tvbnow,bttvb. J8 ^' B- I8 H: c
B.60TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。: R' H2 v1 K( ^3 a- e! s
C.65
! j! e+ M) i2 t0 uTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。D.75 |