math
posted by Christina .
If you are flying to a city 800 miles away, what will be the difference in flight times between flying into a 40mph headwind and flying with a 40mph tailwind if the plane's maximum speed with no wind is 160 mph?

assuming you actually do fly at maximum speed, and recalling that time = distance/speed,
800/(16040)  800/(160+40)
= 800/120  800/200
= 2.666 hours, or 2 hr 40 min
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