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

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) (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
hour = 40 minutes
Key Idea: RT=D using R rate, T time, D distance

________________speed_________time__________distance
WITH WIND_______r+30___________________3600
AGAINST WIND____r-30___________t____________3600
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