SOLUTION: Two planes start from Chicago at the same time and fly in opposite directions, one averaging a speed of 40 miles per hour greater than the other. If they are 2000 miles apart after

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Question 667747: Two planes start from Chicago at the same time and fly in opposite directions, one averaging a speed of 40 miles per hour greater than the other. If they are 2000 miles apart after 5 hours, find their average speeds.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Plane A speed = x
Plane B speed = x+40
They are moving away from each other
combined speed = 2x+40
Distance = 2000
time = 5
d= rt
2000= (2x+40)*5
2000=10x+200
1800=10x
x= 180 mi/h
180mi/h and 220 mi/h are their speeds