Question 918836
Joe left a campsite 4 hours after Liz left and they traveled in opposite directions. Liz was in a car that traveled at 48 km/hr and Joe was in a car that traveled at 72 km/hr.  How far has each person traveled when are they 1008 km apart?

Liz was in a car that traveled at 48 km/hr 

in 4 hours she had traveled 4*48 = 192 km when Joe starts

Distance between them when Joe starts = 1008-192= 816 km

and they traveled in opposite directions.
Add up speeds 72+48=120 km/h

 
Time Joe takes to be 1008 km away = 816/120= 6.18 hours

Liz travels 48*6,8+192=518.4 km
Joe travels 72*6,8=489,6 km.