* * * walked three full distances, and the first meeting took 36÷3= 12 hours.

(54+48) ×12 =1224km

9. (1+1) ÷ (1/40-1/50) = 240km.

4/7 of the whole journey of Party A and 3/(+3+2)=3/5 of the whole journey of Party B.

4/7+3/5 of the whole journey of two cars = 41/35.

That is to say, this is after the meeting

Whole journey:120 ÷ (41/35-1) = 700 km.