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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:

 Aug 27, 2020
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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.

 Aug 27, 2020

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