SOLUTION: If a plane can travel 470 miles per hour with the wind and 430 miles per hour against the wind, find the speed of the plane in still air. What is the speed of the plane in still

Question 373590: If a plane can travel 470 miles per hour with the wind and 430 miles per hour against the wind, find the speed of the plane in still air.
What is the speed of the plane in still air?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi,

Let x represent the speed of the plane in still air & y the speed of the wind

Question states

x + y = 470mph

x - y = 430mph

Adding the equations together

2x = 900mph

x = 450mph, the speed of the plane in still air   

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