慢车速度是快车的5/7,两车从甲、乙两站同时开出相向而行,在离中点36千米处相遇.相遇时快车行驶了多少千米?

问题描述:

慢车速度是快车的

5
7
,两车从甲、乙两站同时开出相向而行,在离中点36千米处相遇.相遇时快车行驶了多少千米?

(36×2)÷(7-5)×7,
=72÷2×7,
=252(千米);
答:相遇时快车行驶了252千米.