SOLUTION: A plane flies 510 miles in 3 hours with the wind. Going against the same wind the plane flies 390 miles in 3 hours. Which of the following is three times the speed of the wind plus

Question 1191199: A plane flies 510 miles in 3 hours with the wind. Going against the same wind the plane flies 390 miles in 3 hours. Which of the following is three times the speed of the wind plus twice the speed of the plane in calm air (no wind)?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
With the wind, and against the wind:

Find whatever you need from the system.

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