[問題]Math GWD 4-06

[evelyn]

If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1)One of the machines produces copies at the constant rate of 250 copies per minute.
(2)One of the machines produces copies at twice the constant rate of the other machine.

答案E可是我覺得是C 題目不就是要問兩台一起印五分鐘可以印多少嗎 那(1) (2)連在一起不就可以有答案了 為什麼是E呢?

[lisa]

因為你不知道250 copies per minute 是印的快的那一台還是印的慢的那一台
如果她是印的快的那一台會有一個答案
但如果她是印的慢的那一台會有另一個答案
所以沒辦法解出唯一答案

[evelyn]

多謝多謝
真厲害!!

[lisa]

不謝不謝~~加油喔!!!