SOLUTION: A passenger plane and a cargo plane leave at the same time from the same airport but travel in opposite directions. The passenger travels at twice the speed of the cargo plane. F

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A passenger plane and a cargo plane leave at the same time from the same airport but travel in opposite directions. The passenger travels at twice the speed of the cargo plane. F      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 363412: A passenger plane and a cargo plane leave at the same time from the same airport but travel in opposite directions. The passenger travels at twice the speed of the cargo plane. Find the speed of each plane if they are 2400 miles apart in 4 hours.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
2,400=(X+2X)4
2,400=3X*4
2,400=12X
12X=2,400
X=2,400/12
X=200 MP FOR THE SLOWER PLANE.
2*200=400 MPH FOR THE FASTER PLANE.
PROOF:
2,400=(200+400)4
2,400=600*4
2,400=2,400