SOLUTION: a plane flies 405 miles with the wind and 315 miles against the wind in the same length of time. if the speed of the with is 20 mph, then find the speed of the plane in still air
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Question 518397: a plane flies 405 miles with the wind and 315 miles against the wind in the same length of time. if the speed of the with is 20 mph, then find the speed of the plane in still air Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! t = d/r
t = 405/(a+20) = 315/(a-20)
9/(a+20) = 7/(a-20)
9(a-20) = 7(a+20)
a = 160 mi/hr
It's airspeed, not "speed of the plane in still air"
