[計量] 數學
Worker W produces n units in 5 hours. Workers V and W,working independently
but at the same time, produce n units in 2 hours. How long would it take
V alone to produce n units?
(A) 1hr 26min
(B) 1hr 53min
(C) 2hr 30min
(D) 3hr 20min
(E) 3hr 30min
ANS: D
謝謝大家幫忙解答~~SORRY~~每次問問題後都忘了謝大家.
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 203.117.140.189
討論串 (同標題文章)