Question 669234
A plane flies 2000 miles from Chicago to Los Angeles with a 50 mph tail wind in 3 1/3 hours. Returining aginst the same wind  it takes 4 hours. what is the speed of the plain of there is no wind?
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Find the 2 speeds using d=r*t
r = d/t
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The plane's airspeed is the average of the 2.