Question 1155140
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The speed with the wind was 644/7 = 92mph; the speed against the wind was 644/14 = 46mph.<br>
Solve the rest of the problem using logical reasoning and simple arithmetic.<br>
The speed of the wind added to the speed of the plane is 92mph; the speed of the wind subtracted from the speed of the plane is 46mph.<br>
That means the speed of the plane is halfway between 46mph and 92mph: 69mph.<br>
And that means the speed of the wind was 69-46 = 23mph.<br>