Flying against the wind, a jet travels 2520mi in 3 hours. Flying with the wind, the same jet travels 10,980mi in 9 hours.

Question

Flying against the wind, a jet travels
2520mi
in
3
hours. Flying with the wind, the same jet travels
10,980mi
in
9
hours. What is the rate of the jet in still air and what is the rate of the wind?

Answer 1

2520 in 3 hours = 7560 miles in 9 hours against the wind

10980 in 9 hours with the wind

10980/9 = j+w = 1220

7560/9 = j-w = 840

2j = 2060

j = 1,030 mph= jet speed in still air

w = 1220-1030 = 190 mph = wind speed