SOLUTION: A plane can fly 340 mph in still air. If it can fly 200 miles downwind in the same amount of time it can fly 140 miles upwind, find the velocity of the wind.

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Question 104223This question is from textbook College Algebra
: A plane can fly 340 mph in still air. If it can fly 200 miles downwind in the same amount of time it can fly 140 miles upwind, find the velocity of the wind. This question is from textbook College Algebra

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x=(wind velocity) ... t=d/r ... the times are the same

200/(340+x)=140/(340-x) ... cross multiplying gives 200(340-x)=140(340+x)