SOLUTION: An airplane trip takes 6hours to fly 2400 kilometers against the wild . the return trip with me wind takes only 4hours . what would be the speed , in kilometers per hour,if the air

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Question 1034222: An airplane trip takes 6hours to fly 2400 kilometers against the wild . the return trip with me wind takes only 4hours . what would be the speed , in kilometers per hour,if the airplane on the same trip traveling when the air is still?

Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
2400 kms/6 hrs= avg speed of 400 kph
2400 kms/4 hrs= avg speed of 600 kph
Difference of speeds is 200 mph; divided by 2 legs this equals 100 mph wind. So:
6(x-100)=4(x+100)
6x-600=4x+400
2x=1000
x=500
So, the plane flies at 500kph in still air!!!!!!!!