SOLUTION: Big plane. A six-passenger plane cruises at 180 mph in
calm air. If the plane flies 7 miles with the wind in the
same amount of time as it flies 5 miles against the wind,
then w
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Question 201088: Big plane. A six-passenger plane cruises at 180 mph in
calm air. If the plane flies 7 miles with the wind in the
same amount of time as it flies 5 miles against the wind,
then what is the wind speed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = wind speed
Let = speed of plane in calm air
Let = time for both trips
given:
With the wind:
--------------------
Add the equations
hrs
and, since
The windspeed is 30 mi/hr
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