SOLUTION: A airplane leaves an airport traveling east at 140 mph. 20 minutes later, a jet leaves the same airport traveling east at 515 mph. how long will the plane be flying before the jet

Question 623655: A airplane leaves an airport traveling east at 140 mph. 20 minutes later, a jet leaves the same airport traveling east at 515 mph.
how long will the plane be flying before the jet passes it?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A airplane leaves an airport traveling east at 140 mph. 20 minutes later, a jet leaves the same airport traveling east at 515 mph.
how long will the plane be flying before the jet passes it?
**
let x=travel time of airplane
x-1/3=travel time of jet (20 min=1/3 hr)
distance=travel time*speed
..
140x=515(x-1/3)=515x-515/3
375x=515/3
x=515/(3*375)*60≈27.5 min
The jet passes the airplane in about 27.5 min
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