查人人中国名人网武器大师s8天赋:一道6年级英语题
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/12 15:27:21
The lengths of two rivers are in the raito 12:7.The lenght of the longer one is 42km. Find the length of the shorter one.
12/7=42/X
X=24.5
Thus the length of the shorter one is 24.5