[問題]天山6-26

[Albert5]

Running at their respective constant rates, machine X takes 2 days longer to produce W widgets than machine Y. At these rate, if the two machines together produce 5/4 W widgets in 3 days, how many days would it take machine X alone to produce 2W widgets?

A.4
B.6
C.8
D.10
E.12

ANS.E

[micht]

這題同GWD10-26
http://www.formosamba.com/phpBB3/viewtopic.php?t=1674