# Speed of a Plane

On a recent flight from Phoenix to Kansas

City, a distance of 919 nautical miles, the plane arrived

20 minutes early.On leaving the aircraft, I asked the captain,

“What was our tail wind?”He replied, “I don’t know, but our

ground speed was 550 knots.” How can you determine if

enough information is provided to find the tail wind? If possible,

find the tail wind. (1 knot = 1 nautical mile per hour)

## The get the distance, you can