If a Plane Can Travel 210 Miles Per Hour with the Wind

Multiple Choice

If a plane can travel 210 miles per hour with the wind and only 190 miles per hour against the wind, find the speed of the wind and the speed of the plane in still air.

A) Plane: $300 \mathrm{mph}$ , wind: $10 \mathrm{mph}$
B) Plane: $10 \mathrm{mph}$ , wind: $200 \mathrm{mph}$
C) Plane: $200 \mathrm{mph}$ , wind: $20 \mathrm{mph}$
D) Plane: $200 \mathrm{mph}$ . wind: $10 \mathrm{mph}$