SOLUTION: If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind find the speed of the plane in still air.

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind find the speed of the plane in still air.       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 411180: If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind find the speed of the plane in still air.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Let "v" be speed of plane in still air.
Let "v1" be speed of the wind.
Equations:
v+%2B+v1+=+480+mph
v+-+v1+=+400+mph.......add and solve for v
2v+=+880mph
v+=+440+mph .....the speed of the plane in still air