Solve the problem.
-A plane flies 420 miles with the wind and 320 miles against the wind in the same length of time. If the speed of the wind is $30 \mathrm{mph}$, what is the speed of the plane in still air?
A) $247 \mathrm{mph}$
B) $222 \mathrm{mph}$
C) $212 \mathrm{mph}$
D) $227 \mathrm{mph}$

Question

Quizplus · Accepted Answer

The Answer of Solve the problem.
-A plane flies 420 miles with the wind and 320 miles against the wind in the same length of time. If the speed of the wind is $30 \mathrm{mph}$, what is the speed of the plane in still air?
A) $247 \mathrm{mph}$
B) $222 \mathrm{mph}$
C) $212 \mathrm{mph}$
D) $227 \mathrm{mph}$

Solve the Problem 30mph30 \mathrm{mph}30mph , What Is the Speed of the Plane in Still

Solve the Problem $30 \mathrm{mph}$ , What Is the Speed of the Plane in Still