求助~！望牛人指点~！

这两道题我完全没明白意思。。希望有人可以帮帮我 呜呜

1.The figure above shows the dimensions of a rectangular box that is to be comletely wrapped with paper. If a single sheet of paper is to be used without patching, then the dimensions of the papercould be（给了图 是个长方体 长宽高已知）

A. 17 in by 25 in……（其中一个选项， 我选项也不明白什么意思……）

2. A rectangular floor is covered by a rug except for a strip P meters wide along each of the four edges. If the floor is M meters by N meters, what is the area of the rug, in square meters?

麻烦同志们帮我翻译一下吧~谢谢~！感激不尽！！

再补充一道。。

A family made a down payment of $75 and borrowed the balance on a set of encyclopedias that costs $400. The balance with interst was paid in 23 monthly payments of $16 each and a final payment of $9.The amount of interests paid was what percent of the amount borrowed?

谢谢你们 帮帮我吧~！