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Posted by **Meghan** on Wednesday, March 24, 2010 at 8:59am.

- Math -
**drwls**, Wednesday, March 24, 2010 at 9:15amLet V be the wind speed. The flight time is D/(140+V)with a tail wind and

D/(140-V) with a head wind.

Solve 700/(140+V) = 400/(140-V)

98,000 -700V = 56,000 +400V

1100V = 42,000

V = 38.2 km/h

- Math -
**Meghan**, Wednesday, March 24, 2010 at 9:37amThanks

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