SOLUTION: It takes 2 hours for a small plane to travel 390 miles with the wind. Going against the wind, the plane can travel 330 miles in the same amount of time. Find the speed of the plane

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Question 840771: It takes 2 hours for a small plane to travel 390 miles with the wind. Going against the wind, the plane can travel 330 miles in the same amount of time. Find the speed of the plane in still air and the speed of the wind.
Answer by hamsanash1981@gmail.com(151) About Me  (Show Source):
You can put this solution on YOUR website!
speed = distance / time taken
speed along with the wind a = 390/ 2 => 195 miles/hour
speep against the wind b = 330/2 => 165 miles/ hour
Speed of still air = (speed along the wind + speed against the wind)/2
speed of the wind = (speed along the wind - speed against the wind)/2
speed of still air = (195+165)/2 => 360/2 => 180
speed of the wind = (195-165)/2 => 30/2 => 15