Question 1129992
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<pre>
u - v = {{{4020/6}}} = 670 mi/h is the effective speed of the plane against the wind.

u + v = {{{8910/9}}} = 990 mi/h is the effective speed of the plane with    the wind.


v = {{{(990-670)/2}}} = 160 miles per hour is the speed of the wind.
</pre>


For your info: the speed of the wind of 160 mi/h is more than the air speed in the eye of a hurricane.


The input data in the problem is NOT realistic.


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In this spot, a real problem from a real student could be placed, who really needs help - instead of these fantasies.



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Hello,


after posting my solution to you, I got your comment regarding my words "The input data in the problem is NOT realistic."


My solution is correct, &nbsp;and these my words are correct, &nbsp;too - there is no doubt.
It happens often that textbooks have errors/(mistakes).



In this case, &nbsp;as in other similar cases, &nbsp;you must say "Thanks" to me first for I solved the problem for you,

and then say "Thanks" to me again for pointing your attention that the input data is unrealistic.


And I really expect that you will do it.



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Regarding my words  ". . . In this spot . . . " - it was a joke, obviously.


Excuse me, please, if you find it rude.