A Plane Flies 420 Miles with the Wind and 340 $22 \mathrm{mph}$

Multiple Choice

A plane flies 420 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is $22 \mathrm{mph}$ , what is the speed of the plane in still air?

A) $199 \mathrm{mph}$
B) $209 \mathrm{mph}$
C) $214 \mathrm{mph}$
D) $234 \mathrm{mph}$