An Airplane Flying Against the Wind Travels 210 Miles in the Same

Multiple Choice

An airplane flying against the wind travels 210 miles in the same amount of time it would take the same plane to travel 230 miles with the wind. If the wind speed is a constant 20 miles per hour, how fast would the plane travel in still air?

A) 38 miles per hour
B) 222 miles per hour
C) 440 miles per hour
D) 241 miles per hour
E) 230 miles per hour