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.com* u# Q% G1 z1 t' N: O
A.50
& i; \8 t. q( p" S7 Htvb now,tvbnow,bttvbB.60 X9 t# ^( [1 Z& [: q3 \
C.65
% J. P& B. m# K* N" ?3 p公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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