Solve the Problem $1200 \mathrm{mi}$ With the Wind, Then Turns Around and Travels For

Solve the problem. Round your answer to the nearest tenth, if necessary.
-A jet plane traveling at a constant speed goes $1200 \mathrm{mi}$ with the wind, then turns around and travels for $1000 \mathrm{mi}$ against the wind. If the speed of the wind is a constant $50 \mathrm{mph}$ , and the total flight took 4 hours, find the speed of the plane.

A) $435 \mathrm{mph}$
B) $605 \mathrm{mph}$
C) $525 \mathrm{mph}$
D) $550 \mathrm{mph}$