Solve
-A Plane Flies 420 Miles with the Wind and 350

question 50

Multiple Choice

Solve.
-A plane flies 420 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is $21 \mathrm { mph }$ , what is the speed of the plane in still air?

• A) \(256 \mathrm { mph }\)
• B) \(236 \mathrm { mph }\)
• C) \(231 \mathrm { mph }\)
• D) \(221 \mathrm { mph }\)