<PRE><B>Question 379790</B>
Scott took an 8 hour trip last Saturday afternoon.
 He left his house and drove 40 mph to his lunch destination.
 He returned the same way going 30 mph.
How far was the total trip if he stopped for 1 hour to eat lunch?
:
Let d  = the one way distance
:
Write a time equation, time = dist/speed
{{{d/40}}} + {{{d/30}}} = 7, (traveling time) 
Multiply by 120 to clear the denominators, results:
3d + 4d = 120(7) 
7d = 120(7)
divide both sides by 7
d = 120 mi is the one way distance
then, obviously:
240 mi is the total distance</PRE>