<PRE><B>Question 523968</B>
an airplane flew with the wind for 2.5 hours and returned the same distance against the wind in 3.5 hours. if the engine speed of the plane was a constant 360 mph in air, how fast was the wind blowing?
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1st I&#39;ve heard of &quot;engine speed&quot;
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d = r*t
a = airspeed, w = windspeed
d = 2.5*(a + w) = 3.5*(a - w)
2.5*(360 + w) = 3.5*(360 - w)
900 + 2.5w = 1260 - 3.5w
6w = 360
w = 60 mi/hr
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