A box which is 20 inches long, 8 inches wide and 2 inches high is to be completely wrapped with paper. If a single sheet of paper is to used without patching, then the dimensions of the paper could be?
答案是21 in by 24 in. 应该是由该长方体完全展开,得到结果。哪位NN能帮助解答一下?谢谢! |