Contact us
Choose a category below so we can get back to you as quickly as possible.
設兩地距離為x. 兩車相遇時,甲車走了x*4/(5+4)=4x/9 乙車走了x*5/(5+4)=5x/9 5x/9-4x/9=x/9=30 x=90*3=270(千米) 所以兩地相距270千米
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.