SOLUTION: Armando flies a plane against a headwind for 5120 miles. The return trip with the wind took 16 hours less time. If the wind speed is 8 mph, how fast does Armando fly the plane when

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Question 1150589: Armando flies a plane against a headwind for 5120 miles. The return trip with the wind took 16 hours less time. If the wind speed is 8 mph, how fast does Armando fly the plane when there is no wind?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
r, the speed when not in wind

Time against the wind, 5120%2F%28r-8%29
Time with the wind, 5120%2F%28r%2B8%29
Difference in time was 16 hours.

Simplify and solve 5120%2F%28r-8%29-5120%2F%28r%2B8%29=16.