Question 982888
The sentence either answers the question or is wrong.  I will proceed as if the "r" in "later" is wrong, and that the trip at 30 mph...  1 hour LATE.


VARIABLES
t, time for normal 
t+1, normal time plus one hour
d, distance either way



______________________rate____________time__________distance
WORK__________________60______________t-1____________d
HOME__________________30______________t+1____________d



RT=D, both distances are equal,
{{{highlight_green(60(t-1)=30(t+1))}}}
Use the value of t to get the distance, d.