SOLUTION: Jack drove to New York City at 60 mph. Jill drove to the city at 40mph. If their combined travel time was 15 hours, how far away was the city?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Jack drove to New York City at 60 mph. Jill drove to the city at 40mph. If their combined travel time was 15 hours, how far away was the city?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 915440: Jack drove to New York City at 60 mph. Jill drove to the city at 40mph. If their combined travel time was 15 hours, how far away was the city?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
D/r = t
D%2F60+%2B+D+%2F40+=+15hr |Multiplying thru by 120 so as all denominators = 1
2D + 3D = 15(120)
5D = 15(120)
D = 15(120)/5 = 360mi