这题看不太懂，谁给翻译一下。

manmanman

The inside dimensions of a rectangular wooden box
are 6 inches by 8 inches by 10 inches. A cylindrical
canister is to be placed inside the box so that it stands
upright when the closed box rests on one of its six
faces. Of all such canisters that could be used, what is
the radius, in inches, of the one that has maximum
volume?
(A) 3
(B) 4
(C) 5
(D) 6
(E) 8

这是OG189题，主要是这句不太明白so that it stands
upright when the closed box rests on one of its six
faces.

lancylee26

就是说这个圆柱体是以垂直这个长方体的某一面而立在这个盒子里面的。这样的话就是避免了空间关系上的多维可能。圆柱的底面积只能在长方体某一个面的面积之内，高度也不可能超过长方体最高的那条边