[高级难度真题]截料方法
奥数网(原创)
2010-08-05 10:48:42
解析:
截法1:2.9+2.9+1.5=7.3
截法2:2.1+2.1+1.5+1.5=7.2
截法3:2.9+2.1+2.1=7.1
答:共用钢筋90根,其中40根用截法1;30根用截法2;20根用截法3.
解析:
截法1:2.9+2.9+1.5=7.3
截法2:2.1+2.1+1.5+1.5=7.2
截法3:2.9+2.1+2.1=7.1
答:共用钢筋90根,其中40根用截法1;30根用截法2;20根用截法3.