SOLUTION: An aeroplane flying with a wind of 30km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind.Find the plane's speed of flying in stil

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: An aeroplane flying with a wind of 30km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind.Find the plane's speed of flying in stil      Log On


   

Question 867155: An aeroplane flying with a wind of 30km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind.Find the plane's speed of flying in still air.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
If just this much is shown to you, can you finish solving?

r = speed without wind
t = time to go 3600 km against the wind
2%2F3 hour = 40 minutes
Key Idea: RT=D using R rate, T time, D distance


________________speed_________time__________distance
WITH WIND_______r+30__________t-2%2F3_________3600
AGAINST WIND____r-30___________t____________3600