SOLUTION: What is the speed of a plane that travels at a rate of 540 mph against a wind of r mph?

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Question 372468: What is the speed of a plane that travels at a rate of 540 mph against a wind of r mph?
Answer by mananth(12270) About Me  (Show Source):
You can put this solution on YOUR website!
If the rate of the plane in still air is 540 mph
then rate against wind will be 540-r mph
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m.ananth@hotmail.ca