Question 283147
d=r*t
d=(r+w)*t
1500=(600+w)*t
1500-300=(600-w)*t

t = 9/4,   w = 200/3
The problem is unclear about what the air speed of the plane means. Is that the speed of the plane with the drag of the wind or the speed of the plane without wind. I calculated it as the speed of the plane without any wind.