SOLUTION: Two planes leave an airport at the same time. One is flying south at 450 mph, and the other if lying north at 675 mph. When will they be 3600 miles apart?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Two planes leave an airport at the same time. One is flying south at 450 mph, and the other if lying north at 675 mph. When will they be 3600 miles apart?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 701023:
Two planes leave an airport at the same time. One is flying south at 450 mph, and the other if lying north at 675 mph. When will they be 3600 miles apart?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
3,600=450T+675T
3,600=1,125T
T=3,600/1,125
T=3.2 HOURS ANS.
PROOF:
3,600=450*3.2+675*3.2
3,600=1,440+2,160
3,600=3,600