Flying against the wind, a jet travels 7440 miles in 8 hours. Flying with the wind, the same jet travels 3570 miles in 3 hours. What is the rate of the jet in stillair and what is the rate of the wind? Rate of the jet in still air: Rate of the wind:
7440 / 8 =930 mph - Plane's speed against the wind
3570 / 3 =1,190 mph - Plane's speed with the wind.
[930 + 1,190] / 2 =1,060 mph - Plane's speed in still air.
[1,190 - 930 ] / 2 =130 mph - wind speed.