Question

At maximum speed, an airplane travels 1680 miles against the wind in five hours. flying with the wind, the plane can travel the same distance in four hours?

Answer 1

Your answer is 378 mph

Explanation:

I just got it right so yeah

Answer 2

Let p be the speed of the plane and w be the speed of the wind. Then:
1680/p-w=5
1680/p+w=4
So:
5p-5w=1680
4p+4w=1680

20p-20w=6720
20p+20w=8400
40p=15120
p=378
w=42
The plane flies at 378 mph; the wind blows at 42 mph. ☺☺☺☺