An airplane flies 720 miles with the wind. In the same amount of time, it can fly 630 miles against the wind.

Question

An airplane flies 720 miles with the wind. In the same amount of time, it can fly 630 miles against the wind. The speed of the plane is still air is 225 mph. Find the speed of the wind

 

 

Write and equation and solve

Answer 1

720/(225+x)  =  630/(225-x)

 

720(225-x)=630(225+x)

 

162000-720x=141750+630x

20250=1350x

x=15