Question 122182
3 hours after Phil leaves. Because:



Ching______________________________________Phil
______________________________________________
               A total of 380 miles


___=__________________________________________
Ching first is at 50 miles


________=______________________________=______
_______100_____________________Lets just say 320




________________=_____________=_______________
_______________150___________260______________


________________________=_____________________
they meet at 200 miles from San Fransisco.

Lets see..
after 3 hours after phil leaves Los angles, Phil meets ching