回年二十九发尽白蚤死:一道6年级英语题

来源:百度文库 编辑:高校问答 时间:2024/05/09 01:50:45
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