Question 979872
RT=D uniform rates rule for travel relates rate time and distance.


________________rate___________time___________distance
Chris___________15_____________1/2-t___________d
Goffy___________12_____________1/2_____________d


The tabulated information needs some thought.  Both left at same point in time.  Chris going faster arrives before Goffy, and Chris required some unknown LESS time t than did Goffy.


Find d using Goffy's data.
{{{12(1/2)=d}}}
{{{d=6}}}-------------d is now known.


Find t using Chris's data.
.
.
Can you do this?