[計量] 請教一題
A manufacturer packages soap powder in containers of three different sizes.
The amount of soap powder in a full large container could fill exactly 3 of
the medium containers or 5 of the small containers. If an equal number of
small and large containers are to be filled with the amount of soap powder
that would fill 90 medium containers, how many small containers will be
filled?
A) 25
B) 27
C) 30
D) 45
E) 54
答案 A。這題要如何解？請高手指點！
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