SOLUTION: a car traveled 600 miles at 60 mph and 40mph on the return trip. What was the average speed for the whole trip

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: a car traveled 600 miles at 60 mph and 40mph on the return trip. What was the average speed for the whole trip      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 358662: a car traveled 600 miles at 60 mph and 40mph on the return trip. What was the average speed for the whole trip
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
d=rt
d/r=t
300/60+300/40=t
5+7.5=t
t=12.5 hours.
600/12.5=48 mph. is the average for the entire trip.