A six-passenger plane cruises at 180 mph in calm air....

G

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A six-passanger plane cruises at 180 mph in calm air. If the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what is the wind speed?
Please help, not sure where to begin with this-Thanks-Caron
 

tkhunny

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Apr 12, 2005
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Rule #1 - Name Stuff.

You never have to be unsure again.

P = Speed of Plane in Calm Air
W = Speed of Wind

P+W = Ground Speed with the wind
P-W = Ground speed against the wind

What's Rule #2?
 
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