SOLUTION: Two planes are 1620 miles apart and ate traveling toward each other. One plane is traveling 120mph faster than the other plane. The planes pass each other in 1.5h find the speed of

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Two planes are 1620 miles apart and ate traveling toward each other. One plane is traveling 120mph faster than the other plane. The planes pass each other in 1.5h find the speed of      Log On


   

Question 902534: Two planes are 1620 miles apart and ate traveling toward each other. One plane is traveling 120mph faster than the other plane. The planes pass each other in 1.5h find the speed of each plane.
Found 2 solutions by lwsshak3, josgarithmetic:
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Two planes are 1620 miles apart and ate traveling toward each other. One plane is traveling 120mph faster than the other plane. The planes pass each other in 1.5h find the speed of each plane.
***
let x=speed of slower plane
x+120=speed of faster plane
x+x+20=2x+20=speed at which planes are traveling toward each other
distance/speed=travel time
1620%2F%282x%2B120%29=1.5
3x+180=1620
3x=1440
x=480
x+120=600
speed of slower plane=480 mph
speed of faster plane=600 mph

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
_________________speed___________time__________distance
_________________r+120____________1.5____________(r+120)*(1.5)
__________________r_______________1.5____________r*(1.5)
Total__________________________________________1620

highlight%28%28r%2B120%29%281.5%29%2Br%281.5%29=1620%29
Simple linear equation in the one variable, r.