考前问一道数学jj-329

250.  
329 一张彩纸1yard*6yards，包一个cube，求能包的cube的最大体积，（1yard=3feet）

2彩纸的面积是6yard^2=54feet^2,cube有六面,所以一面9feet^2,所以长是3feet,所以体积是27feet^3

这倒解释没有看懂，为什么2张彩纸的面积是54feet^2

如果这个cube的变长是3feet,那么这张彩纸的一边正好与cube的一边完全重合，而彩纸是一个长条，怎么能把cube包起来？还是说允许裁剪？？

马上要考了，有nn回答一下么？

            

I think the paper can be cut. Whatever it is cut into two or more pieces the total area of the paper is 54feet^2.

The answer  is correct. One paper with 3 feet wideth and 18 feet length can cover the whole cube because 18/3=6 just cover 6 sides of the cube.

It's my understanding, just for your reference. I'm not NN. I'm also looking forward to NN's explaination.