請教一下og的#404
A square conuntertop has a square tile inlay in the center, leaving an untiled strip of uniform width around the tile. If the ration of the tiled area to the untiled area is 25 to 39, which of the following could be the width, in inches, of the strip?
I) 3/2
II)3
III)9/2
A)I only
B)II only
C)I and II only
D)I and III onoly
E)I, II, and III
Why E?? og解答不是很瞭也 >_<||