Flying against the wind, a jet travels 3220 miles in 7 hours. Flying with the wind, the same jet travels 2820 miles in 3 hours. What is the rate of the jet in still air and what is the rate of the wind?

Answer 1

Since speed * time = distance, we have (with jet=j and wind=w):

7(j-w) = 3220
3(j+w) = 2820

j=700
w=240