SOLUTION: Michael is traveling at 45 mph to his friends house. When he goes home the same way he travels at 40 mph. The round trip takes 4 hours in total. How much distance is the whole trip

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Michael is traveling at 45 mph to his friends house. When he goes home the same way he travels at 40 mph. The round trip takes 4 hours in total. How much distance is the whole trip      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 493256: Michael is traveling at 45 mph to his friends house. When he goes home the same way he travels at 40 mph. The round trip takes 4 hours in total. How much distance is the whole trip.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The average speed is 2*40*45/(40+45) = 720/17 mi/hr
d = r*t = 4*720/17 = 2880/17 miles round trip
=~ 84.7 miles round trip